No way to play piano (4)

I believe the answer is:

loud

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'no' is the definition.
Both the answer and definition are adjectives. Maybe they are linked in a way I don't understand?

'way to play piano' is the wordplay.
'way' becomes 'L' (abbreviation for left).
'to play piano' becomes 'oud' (I can't explain this - if you can you should give a lot more credence to this answer).
'l'+'oud'='LOUD'

Can you help me to learn more?

(Other definitions for loud that I've seen before include "Audibly, or visually, obtrusive" , "Brash" , "Deafening" , "Tastelessly showy" , "At high volume" .)

I've seen this clue in the Evening Standard.

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