Crossword Genius

Flashy guy suffering key interruptions (5)

Ross

I believe the answer is:

gaudy

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This clue might be a double definition.

'flashy' is the first definition.
('gaudy' can be a synonym of 'flashy')

'guy suffering key interruptions' is the second definition.
Although both the answer and definition are singular nouns, I don't understand how they can define each other.

Can you help me to learn more?

(Other definitions for gaudy that I've seen before include "celebrations in college" , "Extravagantly showy; college function" , "Vulgarly bright" , "Flashy" , "Tawdry" .)

I've seen this clue in the Evening Standard.
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