Answer: ridder

AnswerCrossword Clue
RIDDERKnight ... (newspaper publisher)
RIDDERFreer.
RIDDERExterminator.
RIDDERU.S. publishing family
RIDDERInsecticide, e.g.
RIDDERKnight ... (former newspaper group)
RIDDERKnight's publishing partner
RIDDERKnight ... (former newspaper publisher)
ridderone that rids (to free (to set at liberty))