Pay to stay (6)
I believe the answer is:
settle
I believe this is a double definition.
'pay' is the first definition.
(I've seen this before)
'stay' is the second definition.
(thesaurus)
'to' is the link.
(Other definitions for settle that I've seen before include "Become resident" , "Long wooden bench with a back" , "small market town" , "Pay up or become established in place" , "place to sit" .)