Elevator brand (4)
I believe the answer is:
otis
'elevator brand' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for otis that I've seen before include "Miss -- Regrets, Cole Porter song" , "regretful lady" , "---- Redding, 1941-67, soul singer" , "- - Redding (soul music star)" , "Cole Porter's miss who was "unable to lunch today"" .)