Crossword Genius

They conceal curtain rails in temples (7)

Ross

I believe the answer is:

pelmets

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

'conceal curtain rails in temples' is the wordplay.
'temples' can be anagrammed to 'PELMETS'.
Though, I am not sure how the anagram is indicated.

Can you help me to learn more?

I've seen this clue in The Irish Independent.
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