Fight off, drive back (5)

I believe the answer is:

repel

I believe this clue is a double definition.

'fight off' is the first definition.
(synonyms)

'drive back' is the second definition.
(synonyms)

(Other definitions for repel that I've seen before include "Drive back or disgust" , "Put off - disgust" , "Parry" , "Successfully resist" , "Sicken" .)

I've seen this clue in The Guardian.

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