Affection you feel for someone you’re stuck on? (10)
I believe the answer is:
attachment
'affection' is the definition.
(I know that attachment is a type of affection)
'you feel for someone you're stuck on?' is the wordplay.
I cannot really see how this works, but
'on?' could be 'at' (I've seen this in other clues) and 'at' is located in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for attachment that I've seen before include "Liking" , "Affinity" , "Affection" , "File with an email" , "what often comes with spam?" .)