Elevator innovator (4)
I believe the answer is:
otis
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">elevator innovator</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for otis that I've seen before include "Company providing lifts" , "lift company" , "Place of worship; side part of head" , "Miss -- Regrets, Cole Porter song" , "US inventor" .)