Cryptic cultured Phi - something very attractive (11)

I believe the answer is:

pulchritude

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'something very attractive' is the definition.
I can't tell whether this definition defines the answer.

'cryptic cultured phi' is the wordplay.
'cryptic' indicates anagramming the letters (a cryptic or obscure order of the letters).
'cultured'+'phi'='culturedphi'
'culturedphi' with letters rearranged gives 'PULCHRITUDE'.

Can you help me to learn more?

(Another definition for pulchritude that I've seen is " Physical beauty".)

I've seen this clue in The Independent.

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