Exclusion of chess player crying out to be heard (12)
I believe the answer is:
blackballing
'exclusion' is the definition.
(thesaurus)
'chess player crying out to be heard' is the wordplay.
I cannot quite see how this works, but
'chess player' could be 'black' (one of the two players in a game of chess) and 'black' is present in the answer.
The remaining letters 'balling' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
'of' acts as a link.
Can you help me to learn more?
(Another definition for blackballing that I've seen is " Ostracism".)