In sport, knotty fixtures? (4)
I believe the answer is:
ties
'in sport knotty fixtures?' is the definition.
The definition and answer can be both man-made objects as well as being plural nouns.
Perhaps you can see a link between them that I don't see?
This is all the clue.
Can you help me to learn more?
(Other definitions for ties that I've seen before include "obligations" , "allegiances" , "Drawn games" , "Items of neckwear" , "Attaches, knots" .)