Try out striker for important game (4,5)
I believe the answer is:
test match
'important game' is the definition.
'test match' can be an answer for 'game' (type of cricket game). I'm not certain of the 'important' bit.
'try out striker' is the wordplay.
'try out' becomes 'test' (synonyms).
'striker' becomes 'match' (a match can be struck).
'test'+'match'='TEST MATCH'
'for' acts as a link.
Can you help me to learn more?
(Other definitions for test match that I've seen before include "big game for some men?" , "sporting event" , "may involve man dealing with maiden" , "International game" , "important fixture" .)