Drink, large one, then another, note (7)

I believe the answer is:

limeade

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'drink' is the definition.
(limeade is a kind of drink)

'large one then another note' is the wordplay.
'large' becomes 'L' (eg in clothes sizes).
'one' becomes 'i' (Roman numeral).
'then another note' becomes 'meade' (I can't explain this - if you can you should believe this answer much more).
'l'+'i'+'meade'='LIMEADE'

Can you help me to learn more?

(Other definitions for limeade that I've seen before include "Citrus drink" , "Fizzy drink" , "it's a soft one" , "Fruity drink" , "soft drink" .)

I've seen this clue in The Daily Express.

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