Crossword puzzle clue "difficult puzzles may require them"

Here are the possible solutions for difficult puzzles may require them clue

Answer
Clue
Relevancy
hints
Clue
Difficult puzzles may require them
Definition
HINT, to suggest indirectly
metas
Clue
Movies about movies, or puzzles within puzzles, in modern slang
Hidden puzzles within puzzles (like the one in this crossword)
herculeaneffort
Clue
What a difficult task may require
trickydowntheory
Clue
Concept for creating difficult crossword puzzles?
oaths
Clue
Offices may require them
Definition
OATH, a formal declaration or promise to fulfill a pledge
relos
Clue
Promotions may require them, for short
pieces
Clue
Jigsaw puzzles are in them
Definition
PIECE, to join into a whole

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