Answer: redliner

AnswerCrossword Clue
redlinerto engage in redlining
redlinerone that redlines (to withhold loans or insurance from certain neighborhoods)
redlinera. the maximum rotational speed, or angular velocity, of the engine crankshaft that is considered safe: often measured in rpm b. red line or boundary of a red area that delineates such a value, as on a tachometer
redlinerto establish the recommended safe speed of (an airplane)
redlinerto draw a canceling red line through (an item on a list)
redlinerto treat by redlining (an area or neighborhood)