Furry creature in field, greedy guts (9)
I believe the answer is:
groundhog
'furry creature' is the definition.
(type of rodent)
'field greedy guts' is the wordplay.
'field' becomes 'ground' (both can mean an area of land).
'greedy guts' becomes 'hog' (eg someone who hogs food).
'ground'+'hog'='GROUNDHOG'
'in' is the link.
(Other definitions for groundhog that I've seen before include "US native" , "Woodchuck" , "rodent" , "Burrowing animal" .)