Pulp tour across frozen country (4)
I believe the answer is:
mush
I believe this clue is a double definition.
'pulp' is the first definition.
(thesaurus)
'tour across frozen country' is the second definition.
(term for a journey using a sled)
(Other definitions for mush that I've seen before include "Go on, Husky!" , "Soft and soggy mass" , "Pulpy mass - sloppy sentimentality - command to sled dogs" , "Slop - command to huskies!" , "journey over snow with dogs" .)