Arabs embarrassed about being converted to Catholicism (9)

I believe the answer is:

romanised

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'converted to catholicism' is the definition.
I can't tell whether this definition defines the answer.

'arabs embarrassed about' is the wordplay.
'arabs' becomes 'omanis' (Omani is an example).
'embarrassed' becomes 'red' (someone may blush or go red when embarrassed).
'about' indicates putting letters inside.
'omanis' put inside 'red' is 'ROMANISED'.

'being' is the link.

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