---

All answers having "Straight up" as clue:

3 Character Answers:

---

BET



4 Character Answers:

---

NEAT



5 Character Answers:

---

ERECT

NOICE



7 Character Answers:

---

ERECTLY



8 Character Answers:

---

DUENORTH

VERTICAL



9 Character Answers:

---

TRUENORTH