Godzilla’s sister bites back (6)

I believe the answer is:

assist

'back' is the definition.
(thesaurus)

'godzilla's sister bites' is the wordplay.
'bites' indicates a hidden word (the answer has been bitten or eaten by the clue).
'ASSIST' is hidden in the letters of 'godzillas sister'.

(Other definitions for assist that I've seen before include "Help, lend a hand" , "Aid, abet" , "Be useful to" , "Help member" , "Understand by instinct" .)

I've seen this clue in The Guardian.

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