Pay for rest (6)
I believe the answer is:
settle
This could be a double definition.
'pay for' is the first definition.
(I've seen this before)
'rest' is the second definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps you can see an association between them that I can't see?
Can you help me to learn more?
(Other definitions for settle that I've seen before include "Long wooden bench with a back" , "Colonise the bench" , "Decide - stop moving" , "High-backed bench" , "Resolve or precipitate" .)