Sleepers somehow beyond compare (8)
I believe the answer is:
peerless
'beyond compare' is the definition.
(I've seen this before)
'sleepers somehow' is the wordplay.
'somehow' indicates an anagram.
'sleepers' is an anagram of 'PEERLESS'.
(Other definitions for peerless that I've seen before include "Without equal, matchless" , "Beyond compare" , "Unrivalled" , "Without equal, being without a lord?" , "Having no equals" .)