Little worker in banyan tree (3)
I believe the answer is:
ant
'little worker' is the definition.
'ant' can be an answer for 'worker' (worker is a type of ant). I also know that 'little' relates to this answer.
'in banyan tree' is the wordplay.
'in' indicates a hidden word.
'ANT' is hidden within 'banyan tree'.
(Other definitions for ant that I've seen before include "Social worker" , "maybe in hill" , "Little boy" , "Dec's long-time partner" , "A soldier, for one" .)