Parsimonious (6)
I believe the answer is:
frugal
'parsimonious' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for frugal that I've seen before include "Sparing with resources" , "'Thrifty, avoiding waste (6)'" , "'Sparing, economical (6)'" , "Economical with food or money" , "Thrifty or parsimonious" .)