Save Shard after winning concession (10,4)
I believe the answer is:
bargaining chip
'concession' is the definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.
'save shard after winning' is the wordplay.
I cannot really understand how this works, but
'save' could be 'bar' (both can mean 'except') and 'bar' is present in the answer.
'winning' could be 'gaining' ('gain' can be a synonym of 'win') and 'gaining' is present in the answer.
The remaining letters 'chip' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for bargaining chip that I've seen before include "Something to be used in negotiations" , "asset in trading" , "A means of leverage" .)