Rush into a job (6)
I believe the answer is:
career
I believe this clue is a double definition.
'rush' is the first definition.
(career can mean to run or move out of control)
'a job' is the second definition.
(someone's occupation)
'into' acts as a link.
(Other definitions for career that I've seen before include "Progression through working life" , "Tear" , "Long-term occupation" , "Occupation through time" , "Working lifetime" .)