Piece of fire's cinder set aside (7)

I believe the answer is:

rescind

'set aside' is the definition.
(thesaurus)

'piece of fire's cinder' is the wordplay.
'piece of' says the answer is hidden in the clue.
'RESCIND' is hidden within 'fires cinder'.

(Other definitions for rescind that I've seen before include "Annul using cinders" , "Discern in order to cancel, say a law" , "Countermand" , "Revoke (order)" , "undo" .)

I've seen this clue in The Telegraph.

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