Larger toilets regularly reviewed and disinfected (7)
I believe the answer is:
sterile
'disinfected' is the definition.
(sterile can mean clean or disinfected)
'larger toilets regularly reviewed' is the wordplay.
'regularly' means one should take alternating letters (regularly take one letter, leave next etc.).
'reviewed' indicates an anagram (To look at again and re view).
'larger'+'toilets'='largertoilets'
The alternating letters of 'largertoilets' are 'lreties'.
'lreties' anagrammed gives 'STERILE'.
'and' is the link.
(Other definitions for sterile that I've seen before include "Barren" , "Unable to have children" , "Germ-free" , "Not able to produce offspring" , "Free from living micro-organisms, absolutely clean" .)