Move away from taking this to attempt repair? (4,3)
I believe the answer is:
back off
'move away from' is the definition.
(to back off from something is to move away from it)
I cannot understand how the rest of the clue works.
(Other definitions for back off that I've seen before include "as TV may have to be repaired" , "Withdraw from confrontation" , "Give up" , "Retreat" .)