Crossword Puzzle Where sub orders come from

Clue: Where sub orders come from

Not exactly subtle comedy (SLAPSTICK with 9 letters)
2003 comedy whose subtitle is "When Harry Met Lloyd" (DUMBANDDUMBERER with 15 letters)
Coming-of-age comedy gag subjects (BONERS with 6 letters)
Submit, as homework (e.g. HANDIN with 6 letters)
Payment substitute (IOU with 3 letters)
Take the subway (RIDE with 4 letters)
Comedian Wheeler (BERT with 4 letters)
Subj. line alert (ATTN with 4 letters)
Subject of a forwarded e-mail, often (HOAX with 4 letters)
Subject of some dictionaries (SLANG with 5 letters)