Some maze solvers (4)

I believe the answer is:
mice
'some maze solvers' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for mice that I've seen before include "Tiny rodents" , "Small creatures in vermicelli" , "operate computers" , "''Of ... and Men'' (John Steinbeck)" , "people lacking character" .)