Besotted with clue to stun (4,5)

'besotted with' is the definition.
(both can mean in love with or obsessed with)

'clue to stun' is the wordplay.
I cannot really understand how this works, but
an anagram of 'stun' is 'nuts' which is located in the answer.
The remaining letters 'about' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...