S Pacific territory’s stone memorial is to west of country (8,6)
I believe the answer is:
pitcairn island
's pacific territory's' is the definition.
(the Pitcairn Islands, British overseas territory)
'stone memorial is to west of country' is the wordplay.
'stone' becomes 'pit' ('pit' can be a synonym of 'stone'**).
'memorial' becomes 'cairn' (type of memorial made from piled up stones).
'to west of' means one lot of letters go next to another (some letters go to the left of others).
'country' becomes 'land' ('land' can be a synonym of 'country').
'pit'+'cairn'+'is'+'land'='PITCAIRN ISLAND'
(Other definitions for pitcairn island that I've seen before include "Christian home" , "territory" , "Pacific location" , "presumed Christian burial site" .)