Supports fights (5)
I believe the answer is:
spars
This might be a double definition.
'supports' is the first definition.
The definition and answer can be both man-made objects as well as being plural nouns.
Perhaps they are linked in a way I don't understand?
'fights' is the second definition.
(sparring is a kind of fighting)
Can you help me to learn more?
(Other definitions for spars that I've seen before include "Boxes" , "disputes" .)