It has its peers (5)

I believe the answer is:

realm

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'it has its peers' is the definition.
The definition suggests a singular noun which matches the answer.

This is all the clue.

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(Other definitions for realm that I've seen before include "World" , "region" , "Land under a king or queen" , "Area of knowledge under discussion" , "Dominion" .)

I've seen this clue in the Evening Standard.

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