Crossword Genius

Fairy-like period piece (4)

Ross

I believe the answer is:

peri

I'm a little stuck... Click here to teach me more about this clue!

This clue might be a double definition.

'fairy' is the first definition.
(Persian mythological being)

'period piece' is the second definition.
Although both the answer and definition are singular nouns, I can't see how one could define the other.

'like' acts as a link.

Can you help me to learn more?

(Other definitions for peri that I've seen before include "Malevolent Persian spirit" , "Fairy queen" , "Beautiful fairy-like creature" , "Supernatural being in Persian folklore" , "Persian fairy or genie" .)

I've seen this clue in the Evening Standard.
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