Not a single job in Scottish island: a premature cancellation all round (13)
I believe the answer is:
collaboration
'not a single job' is the definition.
(work done by more than one person)
'scottish island a premature cancellation all round' is the wordplay.
'scottish island' becomes 'Coll' (Isle of Coll).
'premature cancellation' becomes 'abortion' (to abort something is to bring it to an end early).
'all round' means one lot of letters goes inside another.
'a' placed inside 'abortion' is 'aboration'.
'coll'+'aboration'='COLLABORATION'
'in' acts as a link.
(Other definitions for collaboration that I've seen before include "Cooperative work" , "teamwork" , "Alliance" , "Assistance" , "Joint work" .)