Agree to restrict nasty smell made by piece of furniture (7)
I believe the answer is:
tallboy
'piece of furniture' is the definition.
(tallboy is a kind of piece of furniture)
'agree to restrict nasty smell' is the wordplay.
'agree' becomes 'tally' ('tally' can be a synonym of 'agree'**).
'to restrict' means one lot of letters goes inside another.
'nasty smell' becomes 'bo' (body odour).
'tally' enclosing 'bo' is 'TALLBOY'.
'made by' acts as a link.
(Other definitions for tallboy that I've seen before include "Cabinet" , "Chests of drawers, one on top of the other" , "Piece of furniture made by lofty youth" , "Chest of drawers for lofty lad" , "Chest of drawers mounted on legs for lofty youth" .)