Big name in elevators (4)
I believe the answer is:
otis
'big name in elevators' 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 "regretful lady" , "US inventor" , "Company providing lifts" , "Regretful miss" , "Miss -- Regrets, Cole Porter song" .)