Cavalier intermittently frozen by rules? Act natural! (2,8)

I believe the answer is:

be yourself

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'act natural' is the definition.
I know nothing about this answer so I can't tell whether this works.

'cavalier intermittently frozen by rules?' is the wordplay.
'cavalier' indicates an anagram (a cavalier or careless spelling).
'intermittently' indicates alternate letters.
The alternate letters of 'frozen' are 'foe'.
'foe'+'by'+'rules'='foebyrules'
'foebyrules' with letters rearranged gives 'BE YOURSELF'.

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(Another definition for be yourself that I've seen is " Act naturally".)

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

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