Gizmo that holds things apart (6)
I believe the answer is:
spacer
'gizmo that holds things apart' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for spacer that I've seen before include "Eg, a washer" , "One may prevent physical contact" , "One keeping apart" , "one creates gap" , "Something which separates" .)