Spoken with love to the right boy (4)
I believe the answer is:
oral
'spoken' is the definition.
(similar in meaning)
'with love to the right boy' is the wordplay.
'with' says to put letters next to each other.
'love' becomes 'o' (love means zero in tennis).
'to the right' becomes 'r' (common abbreviation).
'boy' becomes 'al' ().
'o' put next to 'r' is 'or'.
'or'+'al'='ORAL'
(Other definitions for oral that I've seen before include "Like some tradition" , "By word of mouth, say exam" , "Verbal" , "Kind of examination" , "Spoken, of the mouth" .)