Crossword Genius

Streaming in a quick dash to New York (5)

Ross

I believe the answer is:

runny

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'streaming in a quick' is the definition.
Both the answer and definition are adjectives. Perhaps they are linked in a way I don't understand?

'dash to new york' is the wordplay.
'dash' becomes 'run' (I've seen this before).
'to new york' becomes 'ny'.
'run'+'ny'='RUNNY'

Can you help me to learn more?

(Other definitions for runny that I've seen before include "More liquid than usual" , "Inclined to liquefy, watery" , "Fluid" , "Flowing with ease" , "Not viscous" .)

I've seen this clue in the Evening Standard.
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