Unpleasant moonies out of order (7)
I believe the answer is:
noisome
'unpleasant' is the definition.
(I've seen this before)
'moonies out of order' is the wordplay.
'out of order' indicates anagramming the letters.
'moonies' is an anagram of 'NOISOME'.
(Other definitions for noisome that I've seen before include "Smelling badly" , "Harmful - offensive" , "Moonies (anag.)" , "Rank" , "Foul-smelling - semi-Ono (anag)" .)