Enemy warranting cages (4)

I believe the answer is:

anti

'enemy' is the definition.
(I've seen this in another clue)

'warranting cages' is the wordplay.
'cages' indicates the answer is hidden within the clue (the answer is caged or held).
'ANTI' is hidden in the letters of 'warranting'.

(Other definitions for anti that I've seen before include "Opposition member" , "Negative vote" , "'No' voter" , "on the other side" , "Person opposed" .)

I've seen this clue in The Sun.

Want a hint initially instead of a full solution? Install my app