Having misgivings? That's rather unlikely (8)
I believe the answer is:
doubtful
'unlikely' is the definition.
(I've seen this before)
'having misgivings? that's rather' is the wordplay.
I cannot quite see how this works, but
'misgivings?' could be 'doubt' (I've seen this in another clue) and 'doubt' is present in the answer.
The remaining letters 'ful' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for doubtful that I've seen before include "Dubious" , "Unsettled in mind or opinion" , "Vacillating" , "Uncertain, unlikely" , "Unsure" .)