Thanks to Sleuth for an enjoyable challenge.
I’ve not blogged a Sleuth puzzle before, and am standing in for the regular blogger. I really enjoyed this, and found Sleuth’s trademark long outer perimeter clues a great help to kick-start to grid. The anagrams are quite masterful! Great range of clues, all cleverly and thoughtfully composed. Thanks to Sleuth.

(RUE INEPT LEARNER)* (*poorly)
Cryptic definition
ROVER (dog) trapped by PB (lead, chemical symbol)
Double definition
(A NEUROTIC)* (*mixed up)
CO[s]T (price, not S (small)) in ENTREE (course)
GIG (concert) has [f]L[a]I[r] (on and off)
[th]E US NE[wly]< (element in, <given backing)
(ENDS VISIT)* (*sadly)
SMALL (limited) + [f]ARMS (rural workplaces, with no leader)
[reg]AL BAN[quet] (in)
Saint Alban is the first recorded British Christian martyr.
Cryptic definition
‘Allegro’ is a musical term indicating a brisk, lively pace – sheet music is made up of bars.
(A + RUM< (spirit, <revolutionary)) in (S[uch] (first of) + AI (excellent))
(TRADESMEN POTTER)* (*around)
ELLE (that woman from Quebec, i.e. in French) has (DISMAL SNEER)* (*unusually)
Double definition
COPES* (*engineer) + HERE (in this place)
ELI (priest) captivated by RC (Roman Catholic)
PINES (longs) to get into SPIN< (aspect of bowling, <on reflection)
(A [d]OUBT)* (*resolved, with D (day) gone)
I[ncreased] (early sign of) + C (cold) before GREBE< (bird, <soars)
(UNENVIABLE TRIO)* (*struggling)
ORDER (command) + FORM (to establish)
GEN (information) on DAMES (titled figures) about R (right)
(R, L (two sides, right, left) + U (for all to see, movie rating)) in SNAP (sudden)
E (English) + MB (doctor, Bachelor of Medicine/Medicinae Baccalaureus) on ARGO (ship, from Greek mythology)
“LAAGER” (South African camp, “picked up”)
[thi]S US AN[niversary] (taking part in)
Sleuth, like Flimsy, is another setter we don’t see so often but whose puzzles I usually enjoy.
Today was no exception. Admittedly, the perimeter clues helped to make light work of this solve but it was no less satisfying for all that.
My favourites included GENDARMES, NIPPINESS and for their surfaces, PROVERB and SMALL ARMS. Needed to come here to check the full parsing of 17.
Thanks to Sleuth and Oriel.
Enjoyable with several speed bumps. Couldn’t parse SNARL-UP (which I’ve never heard of) — the hidden British movie classification didn’t help. And I’ve never heard of a laager or St Alban or tenor Gigli. Didn’t think LOO ROLL was cryptic.
LABOUR INTENSIVE was my favourite of the long anagrams and NIPPINESS was cleverly done. It must be hard to come up with really good cryptic definitions, but LOO ROLL perhaps isn’t one of them.
Good fun – for once I abandoned my usual habit of working through the clues in order and tackled the 4 outer anagrams which gave me the corners and borders of the jigsaw puzzle. I did not find either of 9ac or 24ac particularly cryptic – I suppose once one has seen the tricks of “bars”meaning “music” and “to go” being a lavatorial reference the misdirection disappears. However, not everyone will have seen those tricks so I think they are fair cryptic clues. On the other hand Gigli died nearly 70 years ago so was a bit of a reach.
A pity about the lovely “Ellesmere Island” clue – the Québecois use “a” instead of “elle” (quite a few of the pronouns differ).
thanks Sleuth and Oriel
A light but enjoyable romp which I think I finished in a record time!!! Thanks, @SLEUTH.