---

All answers having "Most important" as clue:

3 Character Answers:

---

KEY

TOP



4 Character Answers:

---

CORE

HIGH

MAIN



5 Character Answers:

---

CHIEF

GRAND

PRIME



6 Character Answers:

---

HUGEST

PRIMAL



7 Character Answers:

---

BIGGEST

CENTRAL

PIVOTAL

SALIENT



8 Character Answers:

---

ABOVEALL



9 Character Answers:

---

ESSENTIAL

NUMBERONE

PARAMOUNT