Wanting to include worker (3)
I believe the answer is:
ant
'worker' is the definition.
(worker is a type of ant)
'wanting to include' is the wordplay.
'to include' indicates the answer is hidden within the clue.
'ANT' is hidden in the letters of 'wanting'.
(Other definitions for ant that I've seen before include "that may be a soldier" , "Small social insect" , "Little boy" , "The insect lives in a social colony" , "A soldier, for one" .)