A trial settlement is binding on the Arabian, for instance (6)
I believe the answer is:
lariat
'binding on the arabian for instance' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe you can see an association between them that I don't see?
'a trial settlement' is the wordplay.
'settlement' indicates an anagram.
'a'+'trial'='atrial'
'atrial' with letters rearranged gives 'LARIAT'.
'is' is the link.
Can you help me to learn more?
(Other definitions for lariat that I've seen before include "Long narrow ditch" , "A cowboy's rope used to tether a horse" , "A cowboy's rope with noose" , "Cowboy's rope, lasso" , "Cattle-catching rope" .)