Squashed fruit? (5)
I believe the answer is:
lemon
'fruit?' is the definition.
(lemon is a kind of fruit)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for lemon that I've seen before include "Defective object" , "definitely not a peach" , "Unhelpful answer" , "Fruit squeezed on Pancake Day?" , "Useless object" .)