Rush progress through life (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)
'progress through life' is the second definition.
(I've seen this before)
(Other definitions for career that I've seen before include "Business course through life" , "Life's work path" , "pursuit" , "Job (supposedly for life?)" , "Rush - a job for life?" .)