What may be done about team that's biased (3-5)
I believe the answer is:
one-sided
'biased' is the definition.
(I know that biased can be written as one-sided)
'what may be done about team' is the wordplay.
'what may be' indicates anagramming the letters (I've seen 'what might be' mean this).
'about' is an insertion indicator.
'team' becomes 'side' (both can mean a sports team).
'done' is an anagram of 'oned'.
'oned' placed around 'side' is 'ONE-SIDED'.
'that's' acts as a link.
(Other definitions for one-sided that I've seen before include "Indeed so (anag.)" , "Grossly unequal; biased" , "So denied being unfair or biased" , "Unfair or partisan - single dimension?" , "Biased, favouring one part over another" .)