Note punctured tyre (4)

I believe the answer is:

flat

I believe this is a double definition.

'note' is the first definition.
(thesaurus)

'punctured tyre' is the second definition.
(flat tyre)

(Other definitions for flat that I've seen before include "Even -- pitched too low" , "lacking in taste" , "No longer charged" , "12 [TWO DIMENSIONAL]" , "Dull; set of rooms" .)

I've seen this clue in the Evening Standard.

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