Flee from flexive sort of tureen? (8)

I believe the answer is:

fourteen

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'flee from flexive' is the definition.
I can't judge whether this definition defines the answer.

'sort of tureen?' is the wordplay.
'sort' is an anagram indicator.
'of'+'tureen'='oftureen'
'oftureen' anagrammed gives 'FOURTEEN'.

Can you help me to learn more?

(Other definitions for fourteen that I've seen before include "Fen route (anag)" , "XIV" , "Pounds in a stone?" , "Number of lines in a sonnet" .)

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

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