Possible Clues:

• Pale-brown macaque
• The Rh in Rh positive
• Kind of monkey or blood group
• Macaque variety
• Primate's right hand suppressing potential uses
• In Greek mythology, a king of Thrace
• Monkey rushes out of its tree?
• Monkey often used in research
• He's trapped in crush lacking protection for primate
• __ macaque, a monkey native to south-east Asia