Crossword Genius

Collapses about blood vessels (4-3)

Ross

I believe the answer is:

cave-ins

'collapses' is the definition.
(cave in is a kind of collapse)

'about blood vessels' is the wordplay.
'about' becomes 'ca' (abbreviation for 'circa').
'blood vessels' becomes 'veins' (vein is a kind of blood vessel).
'ca'+'veins'='CAVE-INS'

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