Sportsmen may shoot them for fun (6)
I believe the answer is:
rapids
'sportsmen' is the definition.
Although both the answer and definition are plural nouns, I can't understand how they can define each other.
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for rapids that I've seen before include "Fast-flowing river section" , "Parts of a river where the current is very fast" , "Where rivers run fast" , "Current hazard" , "Fast river flows, white waters" .)