---

All answers having "Extent" as clue:

4 Character Answers:

---

AREA

SIZE

SPAN



5 Character Answers:

---

AMBIT

GAMUT

LIMIT

RANGE

REACH

SCOPE

TRACT



6 Character Answers:

---

DEGREE

LENGTH

TOSOME



7 Character Answers:

---

BREADTH



8 Character Answers:

---

DURATION

WIDENESS



9 Character Answers:

---

MAGNITUDE