Rant wildly about love, yet betray (3,2)
I believe the answer is:
rat on
'betray' is the definition.
(synonyms)
'rant wildly about love yet' is the wordplay.
'wildly' indicates an anagram.
'about' indicates putting letters inside.
'love yet' becomes 'o' (love means zero in tennis. I am not sure about the 'yet' bit.).
'rant' with letters rearranged gives 'ratn'.
'ratn' placed around 'o' is 'RAT ON'.
Can you help me to learn more?
(Other definitions for rat on that I've seen before include "shop" , "Betray" , "Give away" , "grass up" , "desert" .)