Spades or diamonds (4)
I believe the answer is:
suit
I believe this is a double definition.
'spades' is the first definition.
(spades is a playing card suit)
'diamonds' is the second definition.
(diamonds is a playing card suit)
(Other definitions for suit that I've seen before include "Set of garments" , "Be appropriate - part of deck" , "Formal wear (for court action?)" , "Set of cards" , "Administrative official" .)