Runs through one area of land (4)
I believe the answer is:
acre
'area of land' is the definition.
(I've seen this before)
'runs through one' is the wordplay.
'runs' becomes 'r' (cricket abbreviation).
'through' indicates putting letters inside (I've seen this in other clues).
'one' becomes 'ace' (synonyms).
'r' inserted inside 'ace' is 'ACRE'.
(Other definitions for acre that I've seen before include "Unit of land measurement" , "Four thousand, eight hundred and forty square yards" , "amount of land" , "Site of battle" , "0.405 of a hectare" .)