Red dice tossed in final match (7)
I believe the answer is:
decider
'final match' is the definition.
'decider' can be an answer for 'match' (I have seen 'Important match' mean 'decider' so perhaps 'match' could also mean 'decider'). I am not certain of the 'final' bit.
'red dice tossed' is the wordplay.
'tossed' indicates an anagram.
'red'+'dice'='reddice'
'reddice' with letters rearranged gives 'DECIDER'.
'in' acts as a link.
Can you help me to learn more?
(Other definitions for decider that I've seen before include "Last game after a draw" , "Game settling a contest" , "It settles an outcome" , "Settler" , "Clinching game" .)