Here are the possible solutions for event where the number 12 is important and a feature of 12 two word answers in this puzzle clue
Answer
Clue
Relevancy
aameeting
Clue
Event where the number 12 is important, and a feature of 12 two-word answers in this puzzle
four
Clue
Number of times this puzzle's theme word appears diagonally in the grid (to complete the puzzle, shade those words plus the Down answers that begin where they meet)
Definition
the cardinal number next above three
fruitfilling
Clue
Pie feature, or feature of this puzzle's other four longest answers
canyoubreakaten
Clue
Question about change, which hints at the hidden feature of four two-part puzzle answers
materialwitness
Clue
Important trial figure, or what you'll be when you read this puzzle's other four longest answers