Word after "spy" or "nanny" (3)
I believe the answer is:
cam
'word after spy or nanny' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for cam that I've seen before include "Rotating mechanism" , "running into Great Ouse?" , "Irregular projection" , "Eccentric contrivance" , "It controls the motion of engine cylinder valves" .)