Set out at night? (5,5)
'set out at night?' is the definition.
(set of teeth removed nightly)
This is the entire clue.
(Other definitions for denture that I've seen before include "Plate with artificial teeth" , "Set of artificial teeth" , "False teeth plate" , "Set of false teeth" .)
(Other definitions for false teeth that I've seen before include "Plates" , "Choppers that may be taken out" , "Denture's components" , "set out at night" , "New gnashers!" .)