Hi! Pat to rip coach off as doctor swears (11,4)

I believe the answer is:

hippocratic oath

I'm a little stuck... Click here to teach me more about this clue!

'doctor swears' is the definition.
I can't tell whether this defines the answer.

'hi pat to rip coach off' is the wordplay.
'off' is an anagram indicator.
'pat'+'to'+'rip'+'coach'='pattoripcoach'
'pattoripcoach' with letters rearranged gives 'ppocraticoath'.
'hi'+'ppocraticoath'='HIPPOCRATIC OATH'

'as' is the link.

Can you help me to learn more?

(Other definitions for hippocratic oath that I've seen before include "well-known pledge" , "Doctor takes" .)

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

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