Steady reversal is possible (5)
I believe the answer is:
level
'steady' is the definition.
(thesaurus)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for level that I've seen before include "status" , "Storey - stage" , "Flat, even" , "Steady, flat, floor" , "Equal; flat" .)