To infatuate, it's best to have love within (5)
I believe the answer is:
besot
'to infatuate' is the definition.
(I've seen this in another clue)
'best to have love within' is the wordplay.
'to have' indicates putting letters inside.
'love within' becomes 'o' (love means zero in tennis. I am not sure about the 'within' bit.).
'best' going around 'o' is 'BESOT'.
'it's' acts as a link.
Can you help me to learn more?
(Other definitions for besot that I've seen before include "Make stupid" , "Make love" , "Stupefy, make silly or foolish" .)