Bodily suffering (4)
I believe the answer is:
'bodily suffering' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for pain that I've seen before include "Suffering of body or mind" , "Annoying person" , "Unpleasant sensation" , "nuisance to be put up with" , "Symptom of hurt or disorder" .)