Animal coming from mountain, a cat with no tail (6)
I believe the answer is:
alpaca
'animal' is the definition.
(thesaurus)
'mountain a cat with no tail' is the wordplay.
'mountain' becomes 'alp' (alp is a kind of mountain).
'with no tail' means to remove the last letter.
'cat' with its last letter removed is 'ca'.
'alp'+'a'+'ca'='ALPACA'
'coming from' acts as a link.
(Other definitions for alpaca that I've seen before include "Llama-like animal with long black hair" , "Wool-yielding camelid" , "Silky fleece of a lama" , "Fabric made from llama wool" , "Andean camelid" .)