Seer's deck (5)
I believe the answer is:
tarot
'seer's deck' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for tarot that I've seen before include "One in special suit" , "Playing cards" , "Mystic cards" , "These cards are used by fortune tellers" , "one may have been taken from deck" .)