---

All answers having "Gratis" as clue:

4 Character Answers:

---

APEX

COMP

FORO

FREE

FREI



5 Character Answers:

---

NOFEE



7 Character Answers:

---

ASAGIFT

FORFREE

PROBONO



8 Character Answers:

---

ASABONUS

ASAFAVOR

NOCHARGE



10 Character Answers:

---

ONTHEHOUSE



12 Character Answers:

---

FREEOFCHARGE



13 Character Answers:

---

COMPLIMENTARY

WITHOUTCHARGE