Agree with all the comments so far. There are quite a few rickety clues this week:
12a: a schooner is a 2-______. When has any ship been called simply a ______?
13d and 21d: both require very weird accents to work as homonyms.
10d: awful surface. Has there ever been a 'grippy' icicle?!
11a and 17d are clever, though, and it's always a pleasure to discover a new word (5d).