Fonteyn

3 clues
Ballerina Margot
1960s-'70s dance partner of Nureyev
Prima ballerina who married an ambassador
Similar answers:
Abroomofonesown
Afond
Agroomofonesown
Aheadofonestime
Airfone
Alfonse
Alfonso
Alfonsocuaron
Alfonsoribeiro
Alfonsosoriano
Alfonzo
Amajorityofone
Appleofonese
Appleofoneseye
Armyofone
Aroomofonesmoan
Aroomofonesown
Atasteofonesown
Attheendofonesrope
Atthetopofoneslungs