Cards from a suit or a trump to West (5)
I believe the answer is:
tarot
'cards' is the definition.
(I've seen this before)
'from a suit or a trump to west' is the wordplay.
'from' indicates the answer is hidden within the clue.
'to west' says the letters should be written backwards (the letters are written right to left).
'torat' can be found hidden inside 'a suit or a trump'.
'torat' back-to-front is 'TAROT'.
(Other definitions for tarot that I've seen before include "Playing cards" , "Method of fortune-telling" , "Cards used for fortune telling" , "Fortune-teller's card" , "Picture card" .)