Prod with an elbow (5)
I believe the answer is:
nudge
'prod with an elbow' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for nudge that I've seen before include "Gentle poke with elbow" , "Jogger" , "Shove" , "Push; prompt" , "Poke gently with elbow" .)