Heart set on article -- an epergne, perhaps (11)
I believe the answer is:
centrepiece
'an epergne perhaps' is the definition.
(I know that epergne is a type of centrepiece)
'heart set on article' is the wordplay.
'heart' becomes 'centre' (synonyms).
'set on' is a charade indicator (letters next to each other).
'article' becomes 'piece' (article can mean a thing or item).
'centre'+'piece'='CENTREPIECE'
(Other definitions for centrepiece that I've seen before include "Most important object in picture etc" , "Principal part of display" , "table decoration" , "Principal item in display" , "focus of attention" .)