Mostly finding them an excellent inn on the outskirts (2,3,4)
I believe the answer is:
in the main
'mostly' is the definition.
(both can mean generally)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for in the main that I've seen before include "usually" , "mostly" , "Where schools are found" , "Where ships are" , "where to find water" .)