Rodent with large cheek pouches (6)
I believe the answer is:
gopher
'rodent with large cheek pouches' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for gopher that I've seen before include "small animal" , "US ground squirrel" , "Method of teaching reading by sounds" , "mine" , "Rodent with large cheek pouches" .)