Last roundup: cats and horses (9)
I believe the answer is:
stallions
'horses' is the definition.
The definition and answer can be both animals as well as being plural nouns.
Maybe there's a link between them I don't understand?
'last roundup cats' is the wordplay.
I cannot really understand how this works, but
an anagram of 'last' is 'stal' which is present in the answer.
'cats' could be 'lions' (lion is a kind of cat) and 'lions' is located in the answer.
No letters remain.
This explanation may well be incorrect...
'and' is the link.
Can you help me to learn more?
(Another definition for stallions that I've seen is " creatures?".)