Huge US soldier meeting little worker maybe (5)
I believe the answer is:
giant
'huge' is the definition.
(I know that huge can be written as giant)
'us soldier meeting little worker maybe' is the wordplay.
'us soldier' becomes 'GI' (GI can mean an American soldier).
'meeting' is a charade indicator (letters next to each other).
'little worker maybe' becomes 'ant' (as in worker ants).
'gi'+'ant'='GIANT'
(Other definitions for giant that I've seen before include "Jumbo" , "Creature described in 14 17" , "Extremely large (person)" , "Ogre" , "James Dean film (big one!)" .)