Santa's helper (3)

I believe the answer is:

elf

'santa's helper' is the definition.
(I've seen this before)

This is all the clue.

(Other definitions for elf that I've seen before include "Mischievous creature" , "Robin Goodfellow?" , "Diminutive folklore creature" , "Hobgoblin" , "Malignant fairy" .)

I've seen this clue in The Irish Times, the New York Times, the LA Times, the Newsday, The Telegraph, The Star Tribune and the King Feature Syndicate.

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