Mindlessly wearing gaudy colours? (6,7)

I believe the answer is:

parrot fashion

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'mindlessly' is the definition.
Both the answer and definition are adverbs.
Perhaps you can see an association between them that I can't see?

I don't understand how the rest of the clue works.

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(Other definitions for parrot fashion that I've seen before include "trot out this way!" , "Without meaning" , "Thoughtlessly repeated" , "(Learn) by rote" .)

I've seen this clue in The Daily Express.

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