Outline suspicion (5)
I believe the answer is:
trace
I believe this clue is a double definition.
'outline' is the first definition.
(synonyms)
'suspicion' is the second definition.
(suspicion can mean a small trace)
(Other definitions for trace that I've seen before include "plan" , "Vestige, hint" , "Make a copy using transparent paper" , "Smidgen" , "Suggestion of rain" .)