Fido's reward (4)
I believe the answer is:
bone
'fido's reward' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for bone that I've seen before include "Carpal or tarsal, for example" , "#Close to it is risque" , "Skeletal segment" , "Skeleton material" , "Eg, radius or stirrup" .)