When drunk sing Moon River for Catholic dignitary (9)
I believe the answer is:
monsignor
'catholic dignitary' is the definition.
The definition and answer can be both people as well as being singular nouns.
Perhaps you can see a link between them that I don't see?
'when drunk sing moon river' is the wordplay.
'when drunk' indicates an anagram (a drunken or disorderly form of the letters).
'river' becomes 'r' (abbreviation for river).
'sing'+'moon'='singmoon'
'singmoon' anagrammed gives 'monsigno'.
'monsigno'+'r'='MONSIGNOR'
'for' acts as a link.
Can you help me to learn more?
(Other definitions for monsignor that I've seen before include "Title of certain Catholic priests and officials" , "RC dignitary" , "High-ranking RC priest" , "What one may call priest" , "Religious title" .)