Overhear what happens in autumn, but not the start (9)
I believe the answer is:
eavesdrop
'overhear' is the definition.
(I've seen this before)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for eavesdrop that I've seen before include "Listen in, earwig" , "Listen carefully" , "spy" , "Listen without the speaker's knowledge" , "Snoop" .)