Disposing of journalist, evil one brings fuel to the flame (4)

I believe the answer is:

wick

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'flame' is the definition.
Although both the answer and definition are singular nouns, I cannot see how they can define each other.

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for wick that I've seen before include "Highland burgh" , "Northern town" , "Old hamlet" , "The burning cord of candle" , "Scots town; part of candle" .)

I've seen this clue in The Independent.

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