Crossword Genius

A rota arranged for distribution of blood supplies (5)

Ross

I believe the answer is:

aorta

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'distribution of blood supplies' is the definition.
Although both the answer and definition are singular nouns, I don't see how they can define each other.

'a rota arranged' is the wordplay.
'arranged' indicates anagramming the letters.
'rota' with letters rearranged gives 'orta'.
'a'+'orta'='AORTA'

'for' is the link.

Can you help me to learn more?

(Other definitions for aorta that I've seen before include "One leads from heart" , "Trunk route" , "This carries blood from the heart" , "Heart's great artery" , "main arterial route" .)

I've seen this clue in the Evening Standard.
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