Wanting to include tiny creature (3)
I believe the answer is:
ant
'tiny creature' is the definition.
'wanting to include' is the wordplay.
'to include' indicates the answer is hidden within the clue.
'ANT' can be found hidden inside 'wanting'.
(Other definitions for ant that I've seen before include "Six-footer" , "Little boy" , "Termite" , "Hill-dweller" , "Social worker" .)