Sun deck? (5)
I believe the answer is:
tarot
'sun deck?' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for tarot that I've seen before include "Playing cards" , "Set of cards used by fortune-tellers" , "Fortune-teller's pack of cards" , "Special cards for fortune-telling" , "Sort of cards" .)