Horse to follow tailless wild cat (8)
I believe the answer is:
stallion
'horse' is the definition.
(thesaurus)
'follow tailless wild cat' is the wordplay.
'follow' becomes 'stalk' (stalk is a kind of follow).
'tailless' means to remove the last letter.
'wild cat' becomes 'lion' (I've seen this before).
'stalk' with its last letter removed is 'stal'.
'stal'+'lion'='STALLION'
'to' acts as a link.
(Other definitions for stallion that I've seen before include "Male horse, often used for breeding" , "Mount" , "Male steed" , "Stud" , "Male horse kept for breeding" .)