Speak of love with a phoney tear (5)
I believe the answer is:
orate
'speak' is the definition.
(orating is a kind of speaking)
'love with a phoney tear' is the wordplay.
'love' becomes 'o' (love means zero in tennis).
'with' says to put letters next to each other.
'a phoney' indicates anagramming the letters.
'tear' anagrammed gives 'rate'.
'o'+'rate'='ORATE'
'of' is the link.
(Other definitions for orate that I've seen before include "Lecture" , "Speak in florid style" , "Make a lengthy speech" , "make speeches" , "Declaim or rant" .)