Answer: effective

AnswerCrossword Clue
EFFECTIVEIn force
EFFECTIVETelling.
EFFECTIVEPowerful.
EFFECTIVEAble to accomplish a purpose
EFFECTIVETelling
EFFECTIVEOpposite of [circled letters]
effective(esp. of a law or policy) Operative
effectiveSuccessful in producing a desired or intended result
effectiveAssessed according to actual rather than face value
effectiveAn effective serviceman or other person
effectiveFulfilling a specified function in fact, though not formally acknowledged as such
effectiveImpressive; striking