Make short work of a card game (7)
I believe the answer is:
abridge
'make short work' is the definition.
(I've seen this before)
'a card game' is the wordplay.
'card game' becomes 'bridge' (bridge is a kind of card game).
'a'+'bridge'='ABRIDGE'
'of' acts as a link.
(Other definitions for abridge that I've seen before include "Condense, summarise" , "Curtail" , "Cut short" , "Make shorter in brigade" , "Shorten (eg, text)" .)