Enormous soldier ant (5)

I believe the answer is:

giant

'enormous' is the definition.
(thesaurus)

'soldier ant' is the wordplay.
'soldier' becomes 'gi' (government issue or general issue**).
'gi'+'ant'='GIANT'

(Other definitions for giant that I've seen before include "Gargantuan" , "Titan" , "Creature described in 14 17" , "Ogre" , "Superhuman being" .)

I've seen this clue in The Telegraph and The Globe and Mail.

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