Boarder finds cabin right (6)
I believe the answer is:
lodger
'boarder' is the definition.
(I know that boarder can be written as lodger)
'cabin right' is the wordplay.
'cabin' becomes 'lodge' (I've seen this before).
'right' becomes 'r' (common abbreviation).
'lodge'+'r'='LODGER'
'finds' is the link.
(Other definitions for lodger that I've seen before include "One renting a room in a house" , "Renter sharing with the owner" , "Spare room renter" , "One who lives in a hired room" , "Long-term paying guest" .)