Love, as it happens, a stoned fruit (5)
I believe the answer is:
olive
'a stoned fruit' is the definition.
(I've seen this before)
'love as it happens' is the wordplay.
'love' becomes 'o' (In tennis, 'love' means 'zero').
'as it happens' becomes 'live' (as in live television).
'o'+'live'='OLIVE'
(Other definitions for olive that I've seen before include "A Med. fruit-tree" , "Fruit also used to make oil" , "Yellow-green colour like Mediterranean fruit" , "Cocktail fruit" , "woman" .)