A reply that's confused actor (6)
I believe the answer is:
player
'actor' is the definition.
(I know that actor can be written as player)
'a reply that's confused' is the wordplay.
'that's confused' is an anagram indicator.
'a'+'reply'='areply'
'areply' is an anagram of 'PLAYER'.
(Other definitions for player that I've seen before include "Actor - musician" , "Participant in competitive game" , "Contestant" , "Batsman perhaps" , "Actor - footballer?" .)