Petty official (10)
'petty official' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for jobsworth that I've seen before include "A stickler for rules" , "Official who upholds petty rules" , "Petty bureaucrat" , "Petty rules upholder" .)
(Other definitions for bureaucrat that I've seen before include "Government official" , "Mandarin" , "Administrator" .)