Embellishes Cockney's basic description of former nanny? (6)

I believe the answer is:

adorns

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'embellishes' is the definition.
(adorning is a kind of embellishing)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for adorns that I've seen before include "Adds ornamentation" , "Bedecks" , "'Decorates, embellishes (6)'" , "decks" , "Decorates with ornaments" .)

I've seen this clue in The Telegraph.

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