Redesigned sleepers beyond compare (8)
I believe the answer is:
peerless
'beyond compare' is the definition.
(I've seen this before)
'redesigned sleepers' is the wordplay.
'redesigned' indicates anagramming the letters.
'sleepers' anagrammed gives 'PEERLESS'.
(Other definitions for peerless that I've seen before include "Without equal or lacking lords" , "Excellent" , "Having no equals" , "Without equal, matchless" , "Unrivalled" .)