“The unclued entries (6,4 and 5,5,6) were responsible for the thematic event which took place on CHRISTMAS EVE. Across and down clues clash in seven cells. In each across clue there is an extra word which must be removed before solving. The middle letters of these words, read in clue order, give a phrase that cryptically tells solvers which of the clashing letters must be chosen; not all resulting entries are real words. Chambers Dictionary (2016) is recommended; one answer is a variant spelling that can be found in the Oxford Dictionary of English.”
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