Fit us up with one piece of furniture (8)
I believe the answer is:
suitable
'fit' is the definition.
(similar in meaning)
'us up with one piece of furniture' is the wordplay.
'up with' is an anagram indicator (letters get chucked up).
'one' becomes 'i' (Roman numeral).
'piece of furniture' becomes 'table' (table is a kind of piece of furniture).
'us' mixed up with 'i' can make 'sui'.
'sui'+'table'='SUITABLE'
(Other definitions for suitable that I've seen before include "Convenient" , "Fit" , "Appropriate, befitting" , "Appropriate, fitting" , "In keeping" .)