Ends a call (5)
I believe the answer is:
tails
This could be a double definition.
'ends' is the first definition.
(tail is a kind of end)
'a call' is the second definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.
Can you help me to learn more?
(Other definitions for tails that I've seen before include "Morning coat" , "A possible fall of the pound" , "Coin-tossing call" , "Ends" , "the back of bears - bulls too" .)