Genuine piece of furniture, a lowboy (4)
I believe the answer is:
real
'genuine' is the definition.
('real' is associated in meaning with 'genuine')
'of furniture a lowboy' is the wordplay.
'of' says the answer is hidden in the clue.
'REAL' is hidden within 'furniture a lowboy'.
'piece' is the link.
(Other definitions for real that I've seen before include "Existing, not imaginery" , "foreign currency" , "Genuine or existing" , "In America, this estate comprises land and buildings" , "'Genuine, actual (4)'" .)