Customs spurned by nudists (6)

I believe the answer is:

habits

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'customs' is the definition.
(I know this)

I don't understand the remainder of the clue.

(Other definitions for habits that I've seen before include "Customs in nun's clothing?" , "Monks' and nuns' clothing" , "Attire worn by women riders" , "Customs, wonts" , "Customs or robes" .)

I've seen this clue in The Irish News.

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