Doctor encourages taking note out as deposit (5)

I believe the answer is:

dregs

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'as deposit' is the definition.
'dregs' can be an answer for 'deposit' (thesaurus). I am unsure of the 'as' bit.

'doctor encourages taking note' is the wordplay.
'doctor' becomes 'dr' (abbreviation).
'encourages' becomes 'eggs'.
'taking' is a deletion indicator (take can mean remove or delete).
'note' becomes 'g' (musical note).
'eggs' with 'g' taken out is 'egs'.
'dr'+'egs'='DREGS'

'out' acts as a link.

Can you help me to learn more?

(Other definitions for dregs that I've seen before include "Wine sediment" , "Residue of drink" , "Most worthless part (of anything)" , "Sediment - rabble" , "Settlings or deposits" .)

I've seen this clue in The Daily Express.

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