Crossword Genius

Each one a fairy (4)

Ross

I believe the answer is:

peri

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

'each one' is the wordplay.
'each' becomes 'per' ('per' can mean for each).
'one' becomes 'i' (Roman numeral).
'per'+'i'='PERI'

(Other definitions for peri that I've seen before include "Supernatural being in Persian folklore" , "Spirit of folklore" , "A vision of loveliness" , "Ripe as a kind of fairy" , "Persian fairy or genie" .)

I've seen this clue in The Telegraph and The Globe and Mail.
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