Garment worn by Muslims 60 minutes in the morning? (5)

I believe the answer is:

ihram

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'garment' is the definition.
Both the answer and definition are singular nouns.
Perhaps they are linked in a way I don't understand?

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(Other definitions for ihram that I've seen before include "in a holy state" , "In Hajj robe" , "Pilgrim's garment" , "White garb of Muslim pilgrims to Mecca" .)

I've seen this clue in The Sunday Times and The Times.

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