---

All answers having "Very long time" as clue:

3 Character Answers:

---

EON

RHO



4 Character Answers:

---

AEON

AGES

EONS



5 Character Answers:

---

AEONS

YEARS

YONKS



8 Character Answers:

---

BLUEMOON

COONSAGE



11 Character Answers:

---

AGESANDAGES