Moving walkway maker (4)

I believe the answer is:

otis

'moving walkway maker' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for otis that I've seen before include "---- Redding, 1941-67, soul singer" , "-- Redding, US singer" , "- - Redding (soul music star)" , "Miss -- Regrets, Cole Porter song" , "Regretful miss" .)

I've seen this clue in the Newsday, the USA Today, the New York Times and the Newsday.com.

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