Clubs, for example, in legal action (4)
I believe the answer is:
suit
I believe this clue is a double definition.
'clubs for example' is the first definition.
(clubs is a playing card suit)
'legal action' is the second definition.
(synonyms)
'in' is the link.
(Other definitions for suit that I've seen before include "fit" , "clubs, say" , "Set of clothes for legal action" , "Part of pack (of cards)" , "See 1" .)