Challenging United in a cricket club chant (8)
I believe the answer is:
accusing
'challenging' is the definition.
(to accuse someone of a crime is to challenge them)
'united in a cricket club chant' is the wordplay.
'united' becomes 'u' (**).
'in' indicates putting letters inside.
'cricket club' becomes 'cc'.
'chant' becomes 'sing' (I've seen this before).
'a'+'cc'+'sing'='accsing'
'u' inserted within 'accsing' is 'ACCUSING'.
(Other definitions for accusing that I've seen before include "Levelling a charge against" , "Indicting" , "Charging (someone with crime)" , "Charging with an offence" .)