Clue: First letter, in signaling

Answer: ALFA

Length: 4

---

Similar Clues:

• Like arms signaling a neutral zone infraction (AKIMBO with 6 letters)
• Initial Hebrew letter (ALEPH with 5 letters)
• Informal letter signoff (BEST with 4 letters)
• Informal letter closing (BEST with 4 letters)
• Noble headpiece that becomes a brass instrument if you remove it's middle letter (CORONET with 7 letters)
• Letter that might include an emoticon (EMAIL with 5 letters)
• Bus. letter insert (ENCL with 4 letters)
• Letter inserts: Abbr. (ENCS with 4 letters)
• Items incl. with a letter (ENCS with 4 letters)
• Letter resembling an inverted "V" (LAMBDA with 6 letters)