Flamboyant if unattractive topless hosts it's understood (6)

I believe the answer is:

glitzy

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I'm afraid I can't even guess how this answer relates to the clue.

(Other definitions for glitzy that I've seen before include "Superficially showy" , "Slangily showy and glamorous" , "Flashy" , "Garish" , "Extravagant but superficial" .)

I've seen this clue in The Times.

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