Entertainer confusing cat with boar (7)
I believe the answer is:
acrobat
'entertainer' is the definition.
(type of circus entertainer)
'confusing cat with boar' is the wordplay.
'confusing' indicates anagramming the letters.
'with' is a charade indicator (letters next to each other).
'cat'+'boar'='catboar'
'catboar' with letters rearranged gives 'ACROBAT'.
(Other definitions for acrobat that I've seen before include "Athletic Circus Performer" , "circus artiste" , "Gymnastic entertainer" , "Gymnastic performer" , "Circus star" .)