Move location of screw (4)
I believe the answer is:
stir
'move' is the definition.
(stir can mean to make a movement)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for stir that I've seen before include "beat" , "Whisk or rouse" , "Affect emotionally" , "Kerfuffle" , "Move; wake" .)