What happens on some autumnal trees without large earwig (9)
I believe the answer is:
eavesdrop
'earwig' is the definition.
(I've seen this before)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for eavesdrop that I've seen before include "Listen secretly to a private conversation" , "spy" , "Listen in, earwig" , "Hold secret hearing" , "Listen-in" .)