Crossword Genius

Bold porter regularly displaying extravagance (12)

Ross

I believe the answer is:

presumptuous

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'bold' is the definition.
(thesaurus)

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(Other definitions for presumptuous that I've seen before include "Bold - forward" , "Impertinent" , "Assuming too much" , "Impertinently bold" .)

I've seen this clue in The Times.
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