Best ever look? Revolting beards! (7)
I believe the answer is:
goatees
'beards' is the definition.
(I know this)
'best ever look? revolting' is the wordplay.
'best ever' becomes 'GOAT' (GOAT can mean Greatest Of All Time).
'look?' becomes 'see'.
'revolting' says the letters should be written backwards.
'see' reversed gives 'ees'.
'goat'+'ees'='GOATEES'
(Other definitions for goatees that I've seen before include "Short pointed beards" , "Small beards shaped to a point" .)