Wonderful trio with only two notes left (7)

I believe the answer is:

magical

I'm a little stuck... Click here to teach me more about this clue!

'wonderful' is the definition.
(I've seen this before)

'only two notes left' is the wordplay.
'only two' becomes 'magi' (I can't explain this - if you can you should believe this answer much more).
'notes' becomes 'ca'.
'left' becomes 'l' (common abbreviation).
'magi'+'ca'+'l'='MAGICAL'

'trio with' is the link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.

Can you help me to learn more?

(Other definitions for magical that I've seen before include "charmed" , "Fascinating - occult" , "Enchanted" , "tricky?" , "miraculous!" .)

I've seen this clue in the Evening Standard.

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