Converts glossed over atheist (7)

I believe the answer is:

godless

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'atheist' is the definition.
Although both the answer and definition are adjectives, I don't understand how one could define the other.

'converts glossed' is the wordplay.
'converts' indicates anagramming the letters.
'glossed' anagrammed gives 'GODLESS'.

'over' acts as a link.

Can you help me to learn more?

(Other definitions for godless that I've seen before include "Heathen" , "Irreverent - atheistic" , "Of no faith" , "Wicked - impious" , "Profane, wicked" .)

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

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