---

All answers having "Copycat" as clue:

3 Character Answers:

---

APE



4 Character Answers:

---

APER

MIME



5 Character Answers:

---

METOO

MIMER

MIMIC



6 Character Answers:

---

ECHOER

PARROT



7 Character Answers:

---

EPIGONE

IMITATE

METOOER



8 Character Answers:

---

IMITATOR