Cares about these measurements (5)
I believe the answer is:
acres
'cares about these measurements' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for acres that I've seen before include "Cares about the tracts of land" , "Extensive landed property (often rolling)" , "Rival played" , "Scare (anag)" , "Land area measures" .)