Trial match (4)
I believe the answer is:
test
This clue is a double definition.
'trial' is the first definition.
('test' can be a synonym of 'trial')
'match' is the second definition.
(test match is a kind of match)
(Other definitions for test that I've seen before include "Try, examine critically" , "Short exam" , "big game" , "Sample" , "Check" .)