Arrangement to reverse concessions in ring (8)
I believe the answer is:
disposal
'arrangement' is the definition.
(I've seen this before)
'reverse concessions in ring' is the wordplay.
'reverse' says the letters should be written backwards.
'concessions' becomes 'sops' (sop is a kind of concession).
'in' is an insertion indicator.
'ring' becomes 'dial' (I've seen this before).
'sops' written backwards gives 'spos'.
'spos' put within 'dial' is 'DISPOSAL'.
'to' acts as a link.
(Other definitions for disposal that I've seen before include "Jettisoning" , "Act of throwing something away" , "arrangement" , "Scrapping" , "Availability for use" .)