Behave like a wild cat? (3)
I believe the answer is:
act
'behave' is the definition.
(synonyms)
'wild cat?' is the wordplay.
'wild' indicates anagramming the letters.
'cat' with letters rearranged gives 'ACT'.
'like a' is the link.
(Other definitions for act that I've seen before include "Perform on stage" , "Exploit" , "law passed" , "Produce an effect" , "Take steps" .)