Four-inch bananas (4)
I believe the answer is:
hand
'bananas' is the definition.
(I've seen this before)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for hand that I've seen before include "Given cards" , "Player's cards" , "Unit of equine measurement" , "See 12" , "Help < and applause" .)