Crossword Genius

Nothing in painting a major vessel? (5)

Ross

I believe the answer is:

aorta

'major vessel?' is the definition.
(I've seen this before)

'nothing in painting a' is the wordplay.
'nothing' becomes 'O' (looks like zero - 0).
'in' means one lot of letters goes inside another.
'painting' becomes 'art' (I've seen this before).
'o' put within 'art' is 'aort'.
'aort'+'a'='AORTA'

(Other definitions for aorta that I've seen before include "vital transporter" , "Major artery of the body" , "Large trunk artery" , "Bloody channel" , "Main human artery" .)

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