Disengage and remove (6)
I believe the answer is:
detach
'disengage and remove' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for detach that I've seen before include "Disengage, unfasten" , "Split off" , "Disengage (something) and remove it" , "Separate one part from another" , "free" .)