Universal Earth mentor? Fantastic! (6,6)

I believe the answer is:

mother nature

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'universal earth mentor? fantastic' is the definition.
I don't know anything about this answer so I can't tell whether this works.

'universal earth mentor? fantastic' is the wordplay.
'universal' becomes 'U' (film certificate).
'fantastic' indicates an anagram (a fantastic or improbable ordering of the letters).
'u'+'earth'+'mentor'='uearthmentor'
'uearthmentor' with letters rearranged gives 'MOTHER NATURE'.

Can you help me to learn more?

(Other definitions for mother nature that I've seen before include "Universal life force" , "female with ecological concerns?" .)

I've seen this clue in The Times.

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