Noble missing gold rush (4)

I believe the answer is:

gust

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'rush' is the definition.
(I have seen 'Rush of wind ' mean 'gust' so perhaps 'rush' could also mean 'gust')

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for gust that I've seen before include "Sudden blast of wind" , "Flurry" , "Burst of strong wind" , "Squall" , "Sudden rush of wind" .)

I've seen this clue in The Independent.

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