No chance of resolution in The Mystery of the Murdered Rugby Player ? (8)
I believe the answer is:
deadlock
'no chance of resolution' is the definition.
'murdered rugby player ?' is the wordplay.
'murdered' becomes 'dead' ('dead' can be similar in meaning to 'murdered').
'rugby player ?' becomes 'lock' (second row of a scrum).
'dead'+'lock'='DEADLOCK'
'in the mystery of the' is the link.
This may not be right. Some or all of it may be part of another bit of the clue.
(Other definitions for deadlock that I've seen before include "Intractable problem" , "Standstill" , "Stalemate - impasse" , "Log jam" , "Impasse, standoff" .)