Examine some in crate -- stout (4)
I believe the answer is:
test
'examine' is the definition.
(I know that examine can be written as test)
'some in crate stout' is the wordplay.
'some in' indicates the answer is hidden within the clue.
'TEST' can be found hidden inside 'crate stout'.
(Other definitions for test that I've seen before include "Ward off" , "Cricket match; exam" , "Assess - examination" , "Exam to play international cricket" , "Trial; exam" .)