Answer: exponent

AnswerCrossword Clue
EXPONENTSmall number, in math
EXPONENTMathematical expression
EXPONENTPower symbol
EXPONENTAdvocate
EXPONENTSquare figure?
EXPONENTHigh number?
exponentperson who promotes an idea, cause, etc.
exponentone who expounds (to explain in detail)
exponentsymbol placed to the upper right of another to indicate the power to which the latter is to be raised