Vague notion (7)

I believe the answer is:
inkling
'vague notion' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for inkling that I've seen before include "Glimmering of notion" , "Vague suspicion" , "Suspicion, hunch" , "Glimmer of understanding" , "Slight hint or suspicion" .)