Crossword Genius

Supreme garment (7)

Ross

I believe the answer is:

overall

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This clue might be a double definition.

'supreme' is the first definition.
Both the answer and definition are adjectives. Perhaps they are linked in a way I don't understand?

'garment' is the second definition.
(I've seen this before)

Can you help me to learn more?

(Other definitions for overall that I've seen before include "generally speaking" , "It protects a worker" , "Including everything" , "Inclusive" , "Boilersuit" .)

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