Put down in one's very best writing? (6)

I believe the answer is:

record

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'put down' is the definition.
(I know that put down can be written as record)

I can't explain the rest of the clue.

(Other definitions for record that I've seen before include "Statement of events - best so far!" , "release" , "Make a single" , "Witness" , "Highest achievement" .)

I've seen this clue in the Evening Standard.

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