Unsettle (10)
'unsettle' is the definition.
(I know that unsettle is a more specific form of the action disconcert)
This is all the clue.
(Other definitions for disconcert that I've seen before include "Disturb, unsettle" , "Dismay" , "Bother" , "upset" , "Confuse; worry" .)
'unsettle' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for perturb that I've seen before include "Disconcert" , "upset" , "Make uneasy or cause to be worried" , "Disturb greatly" , "Disturb the composure of" .)
'unsettle' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for jar that I've seen before include "Shock; container" , "Pint glass of beer, perhaps" , "Storage container" , "Wide-mouthed vessel" , "Disturbing effect" .)