Solutions Chimp, for instance has 5 entries with similar clues

• 3-letter words
• nim... Chimpsky, primate raised as a human in a landmark language acquisition study
• 4-letter words
• toolStick, for a chimpanzee
• apesChimpanzees, gorillas, et al
• 6-letter words
• bonoboAnimal also known as a pygmy chimpanzee
• 7-letter words
• mishapsHead off bloke involved in young lady's instances of bad fortune