Redding of soul (4)
I believe the answer is:
otis
'redding of soul' 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 "lift company" , "---- Redding, 1941-67, soul singer" , "Company providing lifts" , "Place of worship; side part of head" , "US inventor" .)