Cancel circular without a right (5)
I believe the answer is:
annul
'cancel' is the definition.
(annulling is a kind of cancelling)
'circular without a right' is the wordplay.
'circular' becomes 'annular' ('annular' can be a synonym of 'circular').
'without' suggests deleting specific letters.
'a right' becomes 'ar' (I've seen this in other clues).
'annular' with 'ar' taken out is 'ANNUL'.
(Other definitions for annul that I've seen before include "Obligation" , "Render invalid" , "Make invalid" , "Repeal, rescind" , "Recall" .)