Genuine love lost over current board (9)
I believe the answer is:
veritable
'genuine' is the definition.
(similar in meaning)
'love lost over current board' is the wordplay.
'love' becomes 'o' (love means zero in tennis).
'lost' is a deletion indicator.
'current' becomes 'I' (physics symbol).
'board' becomes 'table' (both can mean food).
'over' with 'o' taken out is 'ver'.
'ver'+'i'+'table'='VERITABLE'
(Other definitions for veritable that I've seen before include "Actual -- authentic" , "Positive" , "True - real" , "True, genuine" .)