People with fine horses (5)
I believe the answer is:
arabs
I believe this clue is a double definition.
'people' is the first definition.
The answer is an example.
'fine horses' is the second definition.
(I've seen this before)
'with' is the link.
(Other definitions for arabs that I've seen before include "They live mainly in the Middle East and North Africa" , "Fine horses" , "Semitic people in the Middle East and northern Africa" , "Semitic people of the Middle East and North Africa" , "Semites" .)