Card trickster (5)
I believe the answer is:
joker
This clue is a double definition.
'card' is the first definition.
(thesaurus)
'trickster' is the second definition.
(thesaurus)
(Other definitions for joker that I've seen before include "53rd card in the pack?" , "Prankster" , "Humorist" , "may appear wild in play" , "Pack's extra card" .)