Newcomer to area, one to sort out dispute? (7)
I believe the answer is:
settler
'newcomer' is the definition.
(thesaurus)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for settler that I've seen before include "who pays his bills" , "new inhabitant" , "Colonist, pioneer" , "One taking up residence in a new area" , "Early colonist" .)