Crossword Clue:

an expert on sexual behaviour

AnswerCrossword Clue
EUGENISTAn expert on heredity.
UMPEDWas an expert on diamonds
GELBAn expert on E. O'Neill
WINEWhat an oenologist is an expert on
KNEWDELHIWas an expert on the Mogul Empire capital?
KNOWATOYOTAWONKRub elbows with an expert on some Japanese cars?