Health precaution a rare condition's brought about? (6,9)

I believe the answer is:

cordon sanitaire

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'health precaution' is the definition.
The definition suggests a singular noun which matches the answer.

'a rare condition's brought about?' is the wordplay.
'brought about?' indicates anagramming the letters (I've seen 'brought about' mean this).
'a'+'rare'+'conditions'='arareconditions'
'arareconditions' is an anagram of 'CORDON SANITAIRE'.

Can you help me to learn more?

(Another definition for cordon sanitaire that I've seen is " barrier to infection".)

I've seen this clue in The Times.

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