Disconcerting (3-7)
'disconcerting' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for off-putting that I've seen before include "Discouraging" , "Disconcerting" .)
'disconcerting' is the definition.
(unnerving is a kind of disconcerting)
This is the entire clue.
(Other definitions for unnerving that I've seen before include "intimidating" , "making one lack confidence?" .)