Perhaps llama or alpaca struggling with mink (4,6)
I believe the answer is:
pack animal
'perhaps llama' is the definition.
(I know that llama is a type of pack animal)
'alpaca struggling with mink' is the wordplay.
'struggling with' indicates anagramming the letters (the letters struggle or wriggle into a new form).
'alpaca' mixed up with 'mink' gives 'PACK-ANIMAL'.
'or' acts as a link.
(Other definitions for pack animal that I've seen before include "llama, perhaps" , "Mule, for example" , "it humps loads" .)