A nice wee grid, capped with a pleasing 1A, cute 2D, and the image given through 16D is good (if not wholesome). I vibed with most of the indicators that were used and eventually clicked to the americanisation of some answers.
In 14A and 8D you have indirect anagrams, which are normally considered unfair to expect solvers to parse correctly (especially when 8D's doing other things too). I'm not sure it's fair for 5D to be combining form (prefix thing) instead of a full blown word.
I'm also very sceptical of 4D's construction of DEF makes WORDPLAY. If you had WORDPLAY makes DEF here then I could have no compunctions, but makes definitely seems like a one-way linking word only to me.