Wearing a shiny coat made Ellen look grotesque (9)

I believe the answer is:

enamelled

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'wearing a shiny coat' is the definition.
The answer and definition are different parts of speech. However, adjectives and past participle verbs can occasionally mean the same thing.

'made ellen look grotesque' is the wordplay.
'made ellen' can be anagrammed to 'ENAMELLED'.
However, I am not sure how the anagram is indicated.

Can you help me to learn more?

(Other definitions for enamelled that I've seen before include "put a coat on" , "Glossy" , "Glossed over" .)

I've seen this clue in the Evening Standard.

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