Winners cash in: MP furious about nothing (9)
I believe the answer is:
champions
'winners' is the definition.
'cash in mp furious about nothing' is the wordplay.
'furious' is an anagram indicator.
'about' indicates putting letters inside.
'nothing' becomes 'o' (looks like zero - 0).
'cash'+'in'+'mp'='cashinmp'
'cashinmp' anagrammed gives 'champins'.
'champins' placed around 'o' is 'CHAMPIONS'.
(Other definitions for champions that I've seen before include "Pinch Amos to find successful competitors" , "best ones" , "They win first place in competitions" , "Winners in competition" , "Defends" .)