Feel unhappy about second upset in race venue (5)
I believe the answer is:
epsom
This might be a double definition.
'feel unhappy about second upset in race' is the first definition.
The definition suggests a singular noun which matches the answer.
'venue' is the second definition.
(I have seen 'Classic venue' mean 'epsom' so perhaps 'venue' could also mean 'epsom')
Can you help me to learn more?
(Other definitions for epsom that I've seen before include "Derby race track" , "Mares would triumph here" , "Downs" , "Home to the Derby and the Oakes" , "Derby town" .)