Crossword clue: to form a scheme; to lay a plan; to contrive; to consider. i thought, devised, and pallas heard my prayer. pope.
1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).
Possible answers
come up with (an idea, plan, explanation, theory, or principle) after a mental effort