Pull apart career (4)
I believe the answer is:
tear
This clue is a double definition.
'pull apart' is the first definition.
(I've seen this before)
'career' is the second definition.
(thesaurus)
(Other definitions for tear that I've seen before include "Dash; drop" , "Hurry" , "Rip, pull apart" , "Droplet; rip" , "Rush - to pull apart" .)