Hypnotist's name? (4)

I believe the answer is:

otis

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

'name?' is the definition.
Although both the answer and definition are singular nouns, I can't understand how they can define each other.

'hypnotist's' is the wordplay.
'OTIS' is hidden within the letters.
But, I'm uncertain how this is indicated.

Can you help me to learn more?

(Other definitions for otis that I've seen before include "Lift man" , "-- Redding, US singer" , "Place of worship; side part of head" , "Company providing lifts" , "Miss -- Regrets, Cole Porter song" .)

I've seen this clue in the Evening Standard.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.