Drunken orderly entertaining northern lecturer in the city (11)
I believe the answer is:
londonderry
'the city' is the definition.
Both the definition and answer are singular nouns.
Maybe you can see a link between them that I don't see?
'drunken orderly entertaining northern lecturer' is the wordplay.
'drunken' is an anagram indicator.
'entertaining' means one lot of letters goes inside another (inviting in, as for dinner).
'northern' becomes 'n' (abbreviation e.g. N. Ireland).
'lecturer' becomes 'don' (don can mean an academic).
'orderly' with letters rearranged gives 'loderry'.
'n'+'don'='ndon'
'loderry' placed around 'ndon' is 'LONDONDERRY'.
'in' is the link.
Can you help me to learn more?
(Another definition for londonderry that I've seen is " One name of Northern Ireland city".)