Song about endless division in state (7)
I believe the answer is:
arizona
'state' is the definition.
(Arizona is an example)
'song about endless division' is the wordplay.
I cannot really see how this works, but
'about' could be 'on' (a book about x is on x) and 'on' is located in the answer.
This explanation may well be incorrect...
'in' is the link.
Can you help me to learn more?
(Other definitions for arizona that I've seen before include "State of SW US" , "State represented by Senators Barry Goldwater and John McCain" , "US state, home to the Grand Canyon" , "State in south-west US" , "Dry US state" .)