Crossword Genius

The chief road to progress (7)

Ross

I believe the answer is:

headway

'progress' is the definition.
(I know that headway is a type of progress)

'the chief road' is the wordplay.
'the chief' becomes 'head' ('head' can be a synonym of 'chief').
'road' becomes 'way' (I've seen this in other clues).
'head'+'way'='HEADWAY'

'to' acts as a link.

(Other definitions for headway that I've seen before include "make progress" , "Advance" , "Progress or success in work" , "Progress, forward movement" , "Ground" .)

I've seen this clue in The Irish News.
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