Sanitation (7)
I believe the answer is:
hygiene
'sanitation' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for hygiene that I've seen before include "The practice or conditions of cleanliness" , "Principles and practice of cleanliness" , "Practice of cleanliness to maintain health" , "Clean, healthy habits" , "Personal cleanliness" .)