Came to love a piece of jewellery (5)
I believe the answer is:
cameo
'a piece of jewellery' is the definition.
(I've seen this before)
'came to love' is the wordplay.
'to love' becomes 'o' (love means zero in tennis).
'came'+'o'='CAMEO'
(Other definitions for cameo that I've seen before include "Carving in relief, on a brooch say" , "Short performance" , "relief work" , "E. Med. nation" , "Piece of jewellery; small role" .)