Rub uncomfortably (5)
I believe the answer is:
chafe
'rub uncomfortably' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for chafe that I've seen before include "Rub annoyingly" , "Fray" , "Rub, irritate" , "Rub abrasively" , "feel irritated" .)