Deepest affections for A&R? (5,2,6)

'deepest' is the definition.
I don't know anything about this answer so I cannot judge whether it can be defined by this definition.

'affections for ar?' is the wordplay.
I cannot really understand how this works, but
'affections' could be 'hearts' ('heart' can be a synonym of 'affection') and 'hearts' is present in the answer.
'for' could be 'to' (eg both can mean 'in the opinion of') and 'to' is present in the answer.
'ar?' could be 'ar' and 'ar' 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?