Every clue answer involves a "trick" (having its letters anagrammed to make a new word entered in the grid) or a "treat" (being given an extra letter to make a new word entered in the grid). There are 20 "trick" words and 20 "treat" words; answer lengths have been omitted to keep each type disguised until its clue has been solved.
There are four proper nouns among clue answers and four among diagram entries.
Across
Down