Soul singer Redding (4)
I believe the answer is:
otis
'soul singer redding' 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" , "Cole Porter's miss who was "unable to lunch today"" , "-- Redding, US singer" , "US inventor" , "regretful lady" .)