As well as to love (3)
I believe the answer is:
too
'as well as' is the definition.
(I've seen this in another clue)
'to love' is the wordplay.
'love' becomes 'o' (love means zero in tennis).
'to'+'o'='TOO'
(Other definitions for too that I've seen before include "As well, also" , "Furthermore" , "On top - also" , "Likewise" , "Moreover, in addition" .)