Such monkeys don't do certain things (5)
I believe the answer is:
brass
This clue could be a double definition.
'such monkeys don't' is the first definition.
The definition suggests a singular noun which matches the answer.
'do certain things' is the second definition.
Although both the answer and definition are singular nouns, I can't understand how one could define the other.
Can you help me to learn more?
(Other definitions for brass that I've seen before include "Readies" , "memorial in church" , "Boldness" , "Descriptive of 7's instrument" , "Ready" .)