Pay for a piece of furniture (6)
I believe the answer is:
settle
I believe this clue is a triple definition!
'pay for' is the first definition.
(I've seen this before)
'a piece' is the second definition.
(I have seen 'piece of furniture' mean 'settle' so perhaps 'piece' could also mean 'settle')
'of' is a link.
'furniture' is the third definition.
(settle is a kind of furniture)
(Other definitions for settle that I've seen before include "Colonise the bench" , "Come to rest -- North Yorkshire market town" , "Get comfortable" , "Bring to an end, agree terms" , "perch" .)