Round top of trophy, see revolving article (6)
I believe the answer is:
cupola
'round top' is the definition.
'trophy see revolving article' is the wordplay.
'trophy' becomes 'cup' (cup is a kind of trophy).
'see' becomes 'lo' (archaic word meaning 'look!').
'revolving' is a reversal indicator.
'article' becomes 'a' (indefinite article).
'lo' back-to-front is 'ol'.
'cup'+'ol'+'a'='CUPOLA'
'of' is the link.
(Other definitions for cupola that I've seen before include "Rounded dome" , "fireplace" , "Small dome on a roof" , "Domed ceiling" , "St Peter's roof" .)