Summary of archaeological event on northern half of property (6)
I believe the answer is:
digest
'summary' is the definition.
(I've seen this before)
'archaeological event on northern half of property' is the wordplay.
'archaeological event' becomes 'gest' (I can't explain this - if you can you should believe this answer much more).
'on' says to put letters next to each other.
'northern half of' indicates taking half (the top half of the word).
'property' becomes 'diam' (diam is a kind of property).
'diam' with half the letters taken is 'di'.
'gest' after 'di' is 'DIGEST'.
'of' is the link.
(Other definitions for digest that I've seen before include "Absorb, in stomach or mind" , "Take in - collected rules of laws" , "Assimilate - summary" , "Break down in the stomach" , "Synopsis" .)