Rodent that menaces sugar cane (6)
I believe the answer is:
agouti
'rodent that menaces sugar cane' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for agouti that I've seen before include "animal" , "Large rodent" , "S.Amer. rodent" , "Long-legged rabbit-sized rodent on Central and South America" , "S. American burrowing rodent" .)