A fat lady at bingo (5)
I believe the answer is:
eight
This might be a double definition.
'a fat lady at' is the first definition.
The answer and definition can be both quantities as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'bingo' is the second definition.
Although both the answer and definition are singular nouns, I can't understand how they can define each other.
Can you help me to learn more?
(Other definitions for eight that I've seen before include "Cube root of five hundred and twelve" , "Carmina Burana composer" , "VIII" , "Several in a row" , "Oxygen's atomic number" .)