Animal guerrilla maybe tethers (5)
I believe the answer is:
llama
'animal' is the definition.
(I've seen this before)
'guerrilla maybe tethers' is the wordplay.
'tethers' indicates the answer is hidden within the clue (the clue ties up or imprisons the answer).
'LLAMA' is hidden within 'guerrilla maybe'.
(Other definitions for llama that I've seen before include "South American cud-chewing mammal" , "Domesticated South American beast" , "Camel-like animal" , "Load-carrier" , "provider of wool" .)