Supplied with notes (3)

I believe the answer is:

fed

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'supplied' is the definition.
(feeding is a kind of supplying)

'with notes' is the wordplay.
'with' becomes 'f' (I can't justify this - if you can you should give a lot more credence to this answer).
'notes' becomes 'ed'.
'f'+'ed'='FED'

Can you help me to learn more?

(Other definitions for fed that I've seen before include "supplied with power?" , "Provided courses" , "Dished up food" , "American cop" , "Given food to eat" .)

I've seen this clue in the Evening Standard.

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