Go for a spin? (4)
I believe this is a double definition.
'go' is the first definition.
('turn' can be a synonym of 'go')
'a spin?' is the second definition.
'for' acts as a link.
(Other definitions for turn that I've seen before include "Revolve; act" , "Rotate - diverge - change" , "Distinctive expression" , "Go - short walk" , "fit" .)
But I've got no explanation for this one! Could you help me understand?
(Other definitions for revolve that I've seen before include "Pirouette" , "Turn around" , "Turn round" , "stage feature" , "Turn on an axis" .)