Answer: operant

AnswerCrossword Clue
OPERANT

Working.

OPERANT

Performer.

OPERANT

Manager.

OPERANT
In running order.
OPERANT
Agent.
OPERANTProducing an effect
OPERANTEffective
OPERANTAt work
OPERANTHaving an effect
OPERANTIn effect