Of Dutch courage? (6)
I believe the answer is:
bottle
This might be a double definition.
'of' is the first definition.
Both the definition and answer are singular nouns.
Perhaps you can see an association between them that I don't see?
'dutch courage?' is the second definition.
(thesaurus)
Can you help me to learn more?
(Other definitions for bottle that I've seen before include "Vessel - nerve" , "Grit" , "See 11" , "beer found in this?" , "Container for liquids" .)