Answer: xfactor

AnswerCrossword Clue
XFACTOR

Unknown

XFACTOR

Unpredictable determinant

XFACTOR

Hard-to-define element

XFACTOR
Nebulous element
XFACTOR
Unknown influence
XFACTORIts effect is hard to predict
XFACTORStrongly influential quality
XFACTORHard-to-define influence
XFACTORUnpredictable element
XFACTORUnknown element
XFACTORJe ne sais quoi
XFACTORElement of surprise?