Answer: hardhead

AnswerCrossword Clue
HARDHEADShrewd negotiator
HARDHEADStubborn person
HARDHEADMule
HARDHEADWhat a mule has, stereotypically
hardheadA marine catfish, the male of which incubates the eggs inside its mouth. It occurs along the Atlantic coast of North America
hardheada practical person