Pioneer to get comfortable on the right (7)
I believe the answer is:
settler
'pioneer' is the definition.
(I've seen this before)
'get comfortable on the right' is the wordplay.
'get comfortable' becomes 'settle' (I've seen this before).
'on' says to put letters next to each other (in a down clue, letters appear on others).
'the right' becomes 'r' (abbreviation).
'settle'+'r'='SETTLER'
'to' acts as a link.
(Other definitions for settler that I've seen before include "Person who moves into an uninhabited country" , "Early colonist" , "Coloniser - arbitrator" , "New colonist" , "newcomer, perhaps" .)