Crossword Genius

Was busy making underpasses (7)

Ross

I believe the answer is:

subways

'underpasses' is the definition.
(I know this)

'was busy making' is the wordplay.
'making' indicates anagramming the letters.
'was'+'busy'='wasbusy'
'wasbusy' anagrammed gives 'SUBWAYS'.

(Other definitions for subways that I've seen before include "Pedestrian tunnels" , "transport systems" , "Underground passages" .)

I've seen this clue in the Sydney Morning Herald.
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