Fighting a lawsuit (6)

I believe the answer is:

action

I believe this clue is a double definition.

'fighting' is the first definition.
(as in military action)

'a lawsuit' is the second definition.
(synonyms)

(Other definitions for action that I've seen before include "Not CIA (anag)" , "Director's cue?" , "Battle (in the law courts?)" , "Order to start shooting" , "Court case" .)

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

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