Toilet (3)
'toilet' is the definition.
(I know that lavatory is a type of toilet)
This is all the clue.
(Other definitions for lavatory that I've seen before include "Something to go on" , "one's flushed" , "somewhere to go?" , "Private chamber" , "Toilet" .)
'toilet' is the definition.
(loo can informally mean a toilet)
This is the entire clue.
(Other definitions for loo that I've seen before include "Card-game" , "Toilet (informal)" , "Card game; the 'smallest room'" , "The little room - card game" , "bog" .)
'toilet' is the definition.
(lavatory)
This is all the clue.
(Other definitions for lav that I've seen before include "toilet" , "Loo" , "Private place in short" .)