Dirty job Scout leader accepted (5)
I believe the answer is:
dusty
'dirty' is the definition.
(similar in meaning)
'job scout leader accepted' is the wordplay.
'job' becomes 'duty'.
'leader' says to take the initial letters.
'accepted' is an insertion indicator.
The initial letter of 'scout' is 's'.
'duty' placed around 's' is 'DUSTY'.
(Other definitions for dusty that I've seen before include "In need of a spring clean" , "Neglected and in need of a clean" , "Grubby" , "Miller - or answer, may be!" , "Study (anag.)" .)