Cancel order for cinders (7)
I believe the answer is:
rescind
'cancel' is the definition.
(rescinding is a kind of cancelling)
'order for cinders' is the wordplay.
'order for' is an anagram indicator.
'cinders' anagrammed gives 'RESCIND'.
(Other definitions for rescind that I've seen before include "Annul - discern (anag)" , "Revoke (order)" , "undo" , "Quash" , "Scrub" .)