Aware of spell after Ancient Mariner recital? (4,5)

'ancient mariner recital?' is the definition.
I know nothing about this answer so I cannot tell whether this works.

'aware of spell' is the wordplay.
I cannot really understand how this works, but
'of' could be 'o' and 'o' is found within the answer.
'spell' could be 'bout' (I've seen this before) and 'bout' is present in the answer.
This may be the basis of the clue (or it may be nonsense).

'after' acts as a link.

Can you help me to learn more?