Crossword clues for Here's an idea... 4 letters:IDEANow there's an ___!' up 2009 IDEA The very ___!" ("What nerve!")IDEAResult of inspirationIDEABrainstormIDEAWhat a light bulb might symbolizeIDEANecessity for a patentIDEASomething hatchedIDEABrainstorm resultIDEAHere's an ___ ...IDEAClueIDEANoodle concoction?IDEABit of mental energyIDEALight bulb, in comicsIDEANotionIDEAWhat's the big __?IDEAEntrepreneur's needIDEALight bulb, in the comicsIDEACartoon bubbleIDEAThing symbolized by a bulbIDEABrain waveIDEABrainchildIDEABrilliant thoughtIDEAGistIDEAThe faintest or "the foggiest" thingIDEAImpressionIDEAInvention necessityIDEAInventor's seedIDEAInventor's sparkIDEAIt's just a thoughtIDEALightbulb, in a cartoonIDEASneaking suspicionIDEAConcept represented by a light bulbIDEAThink pieceIDEAConceptIDEAI have an ___!IDEAAftermath of a brainstormIDEABirth of a notion?IDEAGame planIDEAIt's all in your headIDEAIt's all in your mindIDEAJust a thoughtIDEAMental pictureIDEANew wrinkleIDEASomething to run up the flagpoleIDEAThink tank outputIDEAThoughtIDEAComic light bulb?IDEAFree-association tidbitIDEAInspirationIDEAGray matter creationIDEALight bulb, metaphorically