Land surrounding area in Pacific seaport (7)
I believe the answer is:
seattle
'pacific seaport' is the definition.
(I've seen this before)
'land surrounding area' is the wordplay.
'land' becomes 'settle' (I've seen this before).
'surrounding' means one lot of letters goes inside another.
'area' becomes 'a' (maths abbreviation).
'settle' enclosing 'a' is 'SEATTLE'.
'in' acts as a link.
(Other definitions for seattle that I've seen before include "Place in Washington" , "Largest city in the state of Washington" , "? American seaport" , "city in north-west America" , "major US port" .)