Enthusiasm shown by some in maze -- students (4)
I believe the answer is:
zest
'enthusiasm' is the definition.
(zest can mean enthusiasm or eagerness)
'some in maze students' is the wordplay.
'some in' says the answer is hidden in the clue.
'ZEST' is hidden within 'maze students'.
'shown by' is the link.
(Other definitions for zest that I've seen before include "Enthusiastic enjoyment" , "Peel used as flavouring" , "Verve, gusto" , "Enthusiasm or outer skin of citrus fruit" , "extract of lemon?" .)