Quarrel about river fish (5)
I believe the answer is:
sprat
This could be a double definition.
'quarrel about river' is the first definition.
Although both the answer and definition are singular nouns, I don't understand how one could define the other.
'fish' is the second definition.
(I know that sprat is a type of forage fish)
Can you help me to learn more?
(Other definitions for sprat that I've seen before include "chap giving richer course material to the Dutch" , "Traps for small fish" , "chap on a fat-free diet" , "Mackerel bait?" , "Parts of a very small fish" .)