Order to stop din that's offensive (7)
I believe the answer is:
noisome
'offensive' is the definition.
('noisome' can be similar in meaning to 'offensive')
'order to stop din' is the wordplay.
'order' becomes 'om' (order of merit).
'to stop' indicates putting letters inside.
'din' becomes 'noise' (I've seen this before).
'om' going inside 'noise' is 'NOISOME'.
'that's' is the link.
(Other definitions for noisome that I've seen before include "Obnoxious" , "Smelling bad" , "Offensive, noxious" , "Disgusting -- ie moons (anag)" , "terribly unpleasant" .)