Partner of pains (5)
I believe the answer is:
aches
'partner of pains' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for aches that I've seen before include "Hurts; yearns" , "Dull persistent pains" , "sign of suffering" , "Dull prolonged pains" , "discomfort" .)