---

All answers having "Powerful" as clue:

3 Character Answers:

---

YET



4 Character Answers:

---

HARD

HIGH



5 Character Answers:

---

HEFTY

LUSTY

STOUT



6 Character Answers:

---

DAINTY

MIGHTY

POTENT

ROBUST

SHEIKS

STREAM

STRONG

THRONE



7 Character Answers:

---

DYNAMIC

INTENSE

LEONINE

SINEWED

UNDERGO



8 Character Answers:

---

MUSCULAR

PUISSANT



9 Character Answers:

---

EFFECTIVE



13 Character Answers:

---

HORSECHESTNUT

UNCONDITIONAL