CCCWC August competition voters’ comments on Clue no. 21

A clue to LAUGHTER.
3 comments refer to this clue (from 3 competitors, 0 others)

Here is the text

Comments on the clue

1.	Perhaps a bit too clever, and not sure funny business is a fair definition for the solver
2.	Not sure if this is a clue to LAUGHTER or LAUGHTERS.
3.	I've read this 20 times and still can't see how the cryptic element works.