Sid leaves Skid Row to take a job (4)
I believe the answer is:
work
'a job' is the definition.
('work' can be a synonym of 'job')
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for work that I've seen before include "Earn a living" , "Wildly happy" , "Function; have a job" , "Labour" , "Toil" .)