Look this way in doubt or suspicion (7)
I believe the answer is:
askance
'look this way in doubt or suspicion' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for askance that I've seen before include "(Look) obliquely with mistrust" , "Sideways (of glance)" , "Suspiciously, with disfavour" , "Indirectly" , "Obliquely, quizzically" .)