Organised action saving North American mammal (5)
I believe the answer is:
coati
'american mammal' is the definition.
(I've seen this before)
'organised action saving north' is the wordplay.
'organised' is an anagram indicator.
'saving' suggests deleting specific letters (saving can mean except).
'north' becomes 'N' (abbreviation).
'action' with 'n' taken out is 'actio'.
'actio' anagrammed gives 'COATI'.
(Other definitions for coati that I've seen before include "Raccoon-like animal of Central and S. America" , "Raccoon relative" , "Flesh-eating mammal" , "South American animal" , "American denizen" .)