Letter after 12-Down 4 letters

Crossword clues for Letter after 12-Down 4 letters:

IOTA: Letter after 12-Down
IOUS: Their second letter stands for 12-Down
RISE: What 12-, 26- and 44-Down do from their crossing resting places? (Read the starred answers' indicated letters for a bonus!)
CORPORATEIMAGE: *Business presentation? (... letters 1 + 12-14 along with letters 6-8)
ALPHABETICALLY: How to link the 12 letters in this puzzle with a single line to make a picture
HAWAIIANALPHABET: It uses only the 12 letters A, E, H, I, K, L, M, N, O, P, U and W (like eight long answers in this puzzle)
STEWARDESSES: One of the only 12 letter words that typists can produce with just the left hand on a standard keyboard
COLDOPEN: Certain TV intro ... or a description of each of 12 letters in the grid (the starts of six Across entries and then six Down entries) that spell out an alternate title for this puzzle
LIEDETECTORTEST: Polygraph procedure (... letters 12-9)
XII: 12 letters?
HAWAIIAN: 12-letter language
CHECKERSBUY: 12 letters (SONG)
HONOLULUHAWAII: City whose language uses only the 12 letters found in this puzzle
THETA: Letter before 12-Across
XIS: Letters from 12-Down
ENE: Third letter of 12-Across
FLIPFLOPPING: Switching positions, and a phrase spelled by the first letters of 12 words that have switched positions
EASTCOASTRAPPER: Method Man, for one (see letters 9 to 12 in this answer)
NASCARNATION: Auto-racing fans, collectively (see letters 4 to 12 in this answer)
ICEHOCKEYARENAS: Venues where some play the Blues? (letters 9-13, minus 12)
SOFTSHELLCLAM: Mollusk popular in New England (... letters 1, 4, 7, 12 and 13)
ANIMALSANCTUARY: No-hunting refuge (see letters 3, 4 and 12)
STEAKAUPOIVRE: Peppery beef entree (In this answer, note letters 1, 3, 4 and 12)
ROCKYMOUNTAINS: Denver backdrop (letters 4-5, 6-7 and 12-13)
TROUBLEAHEAD: Concerning outlook (see letters 1, 3, 4, 5 and 12)
JUNIORPARTNER: Certain law firm worker (... letters 4, 6, 8, 10 and 12)
SANJUANISLANDS: Washington archipelago with a Spanish name (letters 3-4, 10-11 and 12-13)
CANNABISEDIBLES: *Kitchen pot products? (Theme hint: See letters 6 to 7 and 11 to 12 in this answer)

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