Burden of the mighty ego getting Bible lesson for conversion (8,6)

I believe the answer is:

noblesse oblige

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'burden of the mighty' is the definition.
I can't judge whether this definition defines the answer.

'ego getting bible lesson for conversion' is the wordplay.
'getting' is a charade indicator (letters next to each other).
'for conversion' indicates anagramming the letters (I've seen this in other clues).
'ego'+'bible'+'lesson'='egobiblelesson'
'egobiblelesson' anagrammed gives 'NOBLESSE OBLIGE'.

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

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