Not wavering (6)
'not wavering' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for steady that I've seen before include "Calm and constant" , "Not wobbly" , "Changeless, constant" , "Not liable to fluctuations" , "One's regular partner" .)
(Other definitions for set that I've seen before include "Harden; fixed; group" , "Arrange; a party" , "Go below the horizon," , "Create a puzzle" , "Fix; lay" .)