Anagrams Plus One

Anagrams Plus One consists of 29 short, but challenging, anagram puzzles with a twist. Using a good dictionary is not only allowed; it's recommended.
Roughly in order of difficulty – or at least, in order of length:

Rules:
1. Every word must contain all of the letters in the word immediately above it, reordered – plus the additional letter shown.
2. In difficult cases a crossword-type clue may be provided.

  1. GEM4
  2. OFT
  3. RAJ
  4. ACE
  5. KIT
  6. WON
  7. YIP
  8. ZEN
  9. BAD
  10. EFT
  11. HAS
  12. IRK
  13. PAN
  14. RIM
  15. SAD
  16. TWO
  17. ACT
  18. CAD
  19. DUO
  20. FAT
  21. GEM7
  22. MAD
  23. NTH
  24. PAR
  25. VET
  26. EAR
  27. LIE
  28. POT
    Answers

Concept