---

All answers having "Heartfelt" as clue:

3 Character Answers:

---

EAT

RED



4 Character Answers:

---

DEAR

DEEP

HYMN

LOVE

MAIN

REAL



5 Character Answers:

---

BORED

BRUTE

TODDY



6 Character Answers:

---

DEVOUT

SOLEMN

USURER



7 Character Answers:

---

EARNEST

SINCERE

SLENDER



8 Character Answers:

---

POIGNANT



9 Character Answers:

---

HOSTILITY



10 Character Answers:

---

VERYLITTLE



13 Character Answers:

---

CORRESPONDENT