To whom Aidan switched from Diana? (5)
I believe the answer is:
nadia
'to whom aidan switched' is the definition.
I don't know anything about this answer so I can't judge whether this works.
'from diana?' is the wordplay.
'from' indicates anagramming the letters (the anagram comes from the same letters).
'diana' anagrammed gives 'NADIA'.
Can you help me to learn more?
(Other definitions for nadia that I've seen before include "___ Comaneci, Romanian-born American gymnast" , "Miss" , "___ Comaneci, Romanian gymnast" , "Russian woman" , "Name of girl" .)