Don't leer horribly, it's suggestive (8)
I believe the answer is:
redolent
'suggestive' is the definition.
(thesaurus)
'don't leer horribly' is the wordplay.
'horribly' indicates an anagram.
'dont'+'leer'='dontleer'
'dontleer' is an anagram of 'REDOLENT'.
'it's' acts as a link.
(Other definitions for redolent that I've seen before include "Aromatic" , "Smelling strongly or suggestive of it" , "Smelling of, evocative" , "Objective scented" , "Fragrant; suggestive (of)" .)