Would echo in the trees (4)
I believe the answer is:
'trees' is the definition.
'would echo' is the wordplay.
I cannot really see how this works, but
'would' could be 'd' (I've seen this in other clues) and 'd' is present in the answer.
The remaining letters 'woo' is a valid word which might be clued in a way I don't see.
This may be the basis of clue (or it may be nonsense).
'in the' is the link.
Can you help me to learn more?
(Other definitions for wood that I've seen before include "Material from trees", "celebrated conductor", "Section of orchestra", "Copse", "Forest - golf club - biased bowl".)