Municipal building in USA involved with moonshine (7,5)
I believe the answer is:
mansion house
'municipal building' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe you can see a link between them that I can't see?
'usa involved with moonshine' is the wordplay.
'involved with' indicates anagramming the letters (involved can mean confusing or complex).
'usa' with its letters anagrammed with 'moonshine' gives 'MANSION-HOUSE'.
'in' acts as a link.
Can you help me to learn more?
(Other definitions for mansion house that I've seen before include "one in the City" , "London building" , "A couple of residences" , "Lord Mayor of London's Residence" , "Where you may find London dignitary" .)