23 down
‘Aussie’
(not
American)
nightwear
(6)
‘Aussie’ (not American) nightwear (6)
hints
0
checks
0
hints
The definition is at the end of the clue.
How the clue works
The definition is nightwear. Start with "Aussie" and remove US (indicated by "not American"), which gives you "A...sie". Then read "A" as ONE (since "a" can mean "one"), and combine ONE with SIE to get ONESIE. A onesie is indeed a type of nightwear!