Service; card (3)
I believe the answer is:
ace
This clue is a double definition.
'service' is the first definition.
(I know that ace is a type of service)
'card' is the second definition.
(ace is a type of playing card)
(Other definitions for ace that I've seen before include "Hole in one; very good" , "'wicked'!" , "unit > of highest quality" , "Best type of tennis serve" , "Test pilot'" .)