Crossword Genius

Nakedly tell off Tina Fey? (5)

Ross

I believe the answer is:

elfin

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

'fey?' is the definition.
(I know that elfin can be written as elfin)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for elfin that I've seen before include "Delicate, slight" , "Small, mischievous and charming" , "Describing Santa's helpers" , "puckish" , "Small and fragile" .)

I've seen this clue in the Sydney Morning Herald.
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