Hotel eyeing reform of sanitation (7)
I believe the answer is:
hygiene
'sanitation' is the definition.
(I've seen this before)
'hotel eyeing reform' is the wordplay.
'hotel' becomes 'h' (phonetic alphabet: alpha, bravo, charlie etc.).
'reform' is an anagram indicator.
'eyeing' is an anagram of 'ygiene'.
'h'+'ygiene'='HYGIENE'
'of' acts as a link.
(Other definitions for hygiene that I've seen before include "Principles and practice of cleanliness" , "Personal cleanliness" , "Clean and healthy practices" , "Clean practice" , "The practice of cleanliness for health reasons" .)