First couple in Arizona initially leaving another part of US for a third (6)
I believe the answer is:
kansas
'first couple' is the definition.
The answer and definition can be both natural objects as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'arizona initially leaving another part of us for a third' is the wordplay.
I cannot quite understand how this works, but
'part' could be 'ans' (ANS is an example) and 'ans' is found within the answer.
'a' is found in the answer.
This explanation may well be incorrect...
'in' is the link.
(Other definitions for kansas that I've seen before include "State north of Oklahoma" , "Where Dorothy and Toto lived with Aunt Em" , "Corny state?" , "American state, capital Topeka" , "''Toto, I've a feeling we're not in ... anymore'' (Dorothy in Wizard of Oz)" .)