Practices are in nuns’ clothes (6)

I believe the answer is:

habits

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This might be a double definition.

'practices are in nuns'' is the first definition.
'habits' can be an answer for 'practices' (I've seen this in another clue). I'm unsure of the 'are in nuns'' bit.

'clothes' is the second definition.
(habiting is a kind of clothing)

Can you help me to learn more?

(Other definitions for habits that I've seen before include "Uniforms of religious orders" , "Customs or monk's gowns" , "Attire worn by women riders" , "Customs or robes" , "Established customs" .)

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

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