Live in discomfort (5,2)
I believe the answer is:
rough it
'live in discomfort' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for rough it that I've seen before include "live without usual comforts" , "Live in discomfort" , "Do the hard way, without ordinary comforts" , "Exist with only the basics" , "take no comfort" .)