Not hopeful result of adding selection of oriental foods (3,3)
I believe the answer is:
dim sum
'not hopeful' is the definition.
The definition suggests a singular noun which matches the answer.
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for dim sum that I've seen before include "Failure of mathematician, possibly" , "Chinese meal, a variety of dishes served in small portions" , "Selection of Chinese appetizers" , "Chinese dish, includes dumplings" , "Chinese food" .)