Died sadly after nose broken, being unbalanced (3-5)
I believe the answer is:
one-sided
'unbalanced' is the definition.
(I've seen this before)
'died sadly after nose broken' is the wordplay.
'sadly' is an anagram indicator.
'after' says to put letters next to each other.
'broken' indicates anagramming the letters.
'died' with letters rearranged gives 'ided'.
'nose' anagrammed gives 'ones'.
'ided' after 'ones' is 'ONE-SIDED'.
'being' acts as a link.
(Other definitions for one-sided that I've seen before include "Unfair, unequal" , "Biased, favouring one part over another" , "Unfair or partisan - single dimension?" , "Unequal like contest between badly matched opponents" , "Unbalanced" .)