Contract card game (ace high) (7)
I believe the answer is:
abridge
'contract' is the definition.
(synonyms)
'card game ace high' is the wordplay.
I cannot quite see how this works, but
'game' could be 'bridge' (card game) and 'bridge' is found in the answer.
'ace' could be 'a' and 'a' is found in the answer.
No letters remain.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for abridge that I've seen before include "Condense, summarise" , "Make shorter in brigade" , "Abbreviate, shorten" , "prune?" , "Concentrate" .)