Quiet secretary tucking into wine that's laid down (10)

I believe the answer is:

prescribed

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'laid down' is the definition.
Although both the answer and definition are past participle verbs, I can't see how one could define the other.

'quiet secretary tucking into wine' is the wordplay.
'quiet' becomes 'p' (music symbol for 'piano', ie soft or quiet).
'secretary' becomes 'scribe' (I can't explain this - if you can you should believe this answer much more).
'tucking into' means one lot of letters goes inside another.
'wine' becomes 'red wine' (red is a type of wine).
'scribe' going within 'red' is 'rescribed'.
'p'+'rescribed'='PRESCRIBED'

'that's' is the link.

Can you help me to learn more?

I've seen this clue in The Guardian.

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