Joker - or some other one from the pack? (4)
I believe the answer is:
card
'joker' is the definition.
(joker is a type of playing card)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for card that I've seen before include "Stiff paper; plastic money" , "Birthday greeting" , "Stiff paper; comb" , "witty type" , "A jack, for example" .)