Crossword Genius

Fine blue stream (4)

Ross

I believe the answer is:

flow

'stream' is the definition.
('flow' can be a synonym of 'stream')

'fine blue' is the wordplay.
'fine' becomes 'f' (abbreviation).
'blue' becomes 'low' (I've seen this in other clues).
'f'+'low'='FLOW'

(Other definitions for flow that I've seen before include "Move along as a stream" , "Steady continuous stream" , "Move steadily" , "Run or move like a liquid" , "Fluid motion" .)

I've seen this clue in The Telegraph.
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