He hopes to find insects on tap (10)
I believe the answer is:
woodpecker
'find insects on tap' is the definition.
Although both the answer and definition are singular nouns, I can't understand how they can define each other.
'he hopes' is the wordplay.
I cannot really understand how this works, but
'he' could be 'wood' and 'wood' is found within the answer.
The remaining letters 'pecker' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
'to' acts as a link.
Can you help me to learn more?
(Other definitions for woodpecker that I've seen before include "Tapping bird" , "Knocking bird" , "Bird that drills holes" .)