Rigueur

1 clue
De __: strictly proper
Similar answers:
Aboriginal
Aboriginalart
Aborigine
Aborigines
Abrightparticularstar
Absolutelyright
Adisrightforyou
Affrighted
Africanmarigold
Agefright
Airportfrig
Airrights
Albright
Albrightmenckenwright
Alertantbrigade
Alexrodriguez
Alienorrigby
Allright
Allrightalready
Allrightbut