Speak of love and class (5)
I believe the answer is:
orate
'speak' is the definition.
(orating is a kind of speaking)
'love and class' is the wordplay.
'love' becomes 'o' (In tennis, 'love' means 'zero').
'and' says to put letters next to each other.
'class' becomes 'rate' (I've seen this before).
'o'+'rate'='ORATE'
'of' is the link.
(Other definitions for orate that I've seen before include "Speechify" , "Talk pompously" , "make speeches" , "Harangue" , "Give speech" .)