Indian moon waning now? (4,6)

I believe the answer is:

anno domini

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'now?' is the definition.

'indian moon waning' is the wordplay.
'indian moon' anagrams to 'ANNO DOMINI'.
Though, I am not sure how this is indicated.

Can you help me to learn more?

(Other definitions for anno domini that I've seen before include "In the year of our Lord" , "having a date, she may put it on" , "later days" , "AD in full" , "Advancing old age (informal)" .)

I've seen this clue in The Everyman puzzle in The Observer.

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