Such candles soon burn out (5)

I believe the answer is:

roman

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'out' is the definition.
Although both the answer and definition are adjectives, I can't see how one could define the other.

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

Can you help me to learn more?

(Other definitions for roman that I've seen before include "Denizen of the eternal city" , "Old Italian l" , "- Catholic; - candle" , "Citizen of Italian capital" , "- Empire; - nose" .)

I've seen this clue in the Evening Standard.

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