One male, totally revolting animal that might spit at you? (5)
I believe the answer is:
llama
'animal that might spit at you?' is the definition.
'one male totally revolting' is the wordplay.
'one' becomes 'a'.
'male' becomes 'm' (common abbreviation).
'totally' becomes 'all'.
'revolting' says the letters should be written in reverse.
'a'+'m'+'all'='amall'
'amall' back-to-front is 'LLAMA'.
(Other definitions for llama that I've seen before include "Alpaca" , "Domesticated pack animal of the Andes" , "Long-necked woolly animal" , "S American animal like a camel with soft hair" , "woolly customer" .)