Guardian Quiptic No 581 by Pan

I think this one fills the Quiptic slot very well, with no obscurities of vocabulary, construction  or references.

ACROSS

1 PANATELLA Anagram (‘change’) of ‘lent  a pal’ + ‘a’.
6 COST Envelope of S (‘beginning to S[nore]’) in COT (‘bed’).
8 DUMPLING D (‘Dutch’) + anagrams (‘stewed’) of ‘plum’ and ‘gin’.
9 APPEND Charade of ‘a’ + PP (‘couple of pages’) + END (‘last section’).
10 THRUSH Double definition; the bird and an infection(or this, if you happen to be a horse).
11 COGITATE Envelope (‘wearing’) of GIT (‘fool’) in COAT (‘anorak’) + E (‘English’).
12 SPEECH Envelope (‘during’) of PEE (‘relieve oneself’) in SCH (abbreviation of ‘school’).
15 LISTLESS Double definition, one slightly cryptic LIST-LESS (without catalogue’).
16 CRACKPOT Likewise: CRACK-POT (‘place to store drugs?’).
19 AGENDA ‘a’ + GENDA, homophone (‘a speaker’s’) of gender (grammatical category’).
21 AMERICAN Anagram (‘crazy’) of ‘main race’.
22 GOBBLE Double definition.
24 INCEST Hidden answer (‘to cover up’) in ‘[conv]INCE ST[ripper]’.
25 FRAGRANT FR (‘father’; very common, when it does not indicate PA) + ‘a’ + GRANT (‘gift’).
26 WARY Charade of WAR (‘hostilities’) + Y (‘close to [enem]Y’).
27 HELLEBORE Envelope of reversal(‘back’) of BELLE (‘beautiful girl’) in HORE, anagram (‘distraught’) of ‘hero’. A wild or cultivated flower.

DOWN

1 PLUSH Charade of PLUS (‘bonus’, principally as a noun) + H (‘hospital’; common abbreviation).
2 NEPTUNE Charade of a reversal(‘coming up’, in a down light) of PEN (‘swan’, the female of the species) + TUNE (‘air’). ‘for’ is mainly for the surface. Definition: the Roman sea-god.

3 THIGH Charade of T (‘T[eenager] principally’) + HIGH (‘excited’).
4 LOGICAL Envelope of G (‘German’) + I (‘setter’) in LOCAL (‘nearest pub’).
5 ANALGESIA Anagram (‘dodgy’) of ‘lasagne I’ + A (‘A[te] to start with’).
6 CAPITAL Charade of CA (‘chartered accountant’) + PIT (‘mine’) + AL (Alabama, ‘state’).
7 SANITISED Anagram (‘unbalanced’) of ‘diets a sin’.
13 PYROMANIA Charade of PY (‘extremely PeskY’) + ROMANIA (‘country’).
14 HOPSCOTCH Envelope of OPSC, an anagram (‘beaten’) of ‘cops’ in HOT (‘animated’) + CH (‘children’). For the purposes of the wordplay, the definition is just ‘game’, although hopscotch is of course a children’s game. The most elaborate construction of the puzzle, but clearly laid out in the clue.
17 CARVERY Envelope (‘entertaining’) of VE (‘disheartened V[eggi]E’) in CARRY (‘bear’).
18 TANKFUL T[h]ANKFUL (‘feeling appreciation’) less H (‘henry’; the standard abbreviation for the unit of inductance).
20 EMBARGO Anagram (‘erupt’) of ‘mob rage’.
22 GRAPE Charade of G (‘good’) + RAPE (‘crop’; the brassica grown mainly for the producton of rape seed oil, known in the US as canola).
23 LANCE Envelope of C (‘Catholic’) in LANE (‘narrow street’).