Excitement fighting lawsuit (6)
I believe the answer is:
action
This clue is a triple definition!
'excitement' is the first definition.
(thesaurus)
'fighting' is the second definition.
(as in military action)
'lawsuit' is the third definition.
(synonyms)
(Other definitions for action that I've seen before include "A judicial proceeding brought by one party against another" , "skirmish" , "Litigation" , "Court case" , "''. . . . . . speaks louder than words'' (6)" .)