Rush into a job for life (6)

I believe the answer is:

career

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'rush' is the definition.
(career can mean to run or move out of control)

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for career that I've seen before include "Lifetime's work" , "Life's work path" , "Rush - occupation" , "Mad rush" , "Long-time occupation" .)

I've seen this clue in The Globe and Mail.

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