Bit on back of horse -- hock, for example? (5)
I believe the answer is:
white
This might be a double definition.
'bit on back of horse hock' is the first definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'example?' is the second definition.
Although both the answer and definition are singular nouns, I don't see how one could define the other.
'for' acts as a link.
Can you help me to learn more?
(Other definitions for white that I've seen before include "11's domicile" , "murderer" , "Drink that should be chilled" , "Covered in snow" , "and 9: What Bing Crosby dreamed about" .)