| Black cloud : anger :: light bulb : __ | 38 |
| Bit of creativity | 17 |
| Bit of brainwork | 16 |
| Big or bright thing | 19 |
| "You have no ___" | 27 |
| "Whose bright ___ was this?" | 38 |
| "What's the big ---?" | 35 |
| "What's the big __?" | 34 |
| "The very ____!" ("What nerve!") | 52 |
| "The very _____!" | 27 |
| "That's the general __" | 37 |
| "No ___" ("Beats me") | 41 |
| "I have an __!" | 25 |
| "Eureka!" cause | 25 |
| You may bounce it off someone | 29 |
| Writer's block buster | 25 |
| Word exclaimed after "no" or "good" | 55 |
| What's the big ___? | 23 |
| What's on your mind, perhaps | 32 |
| What a light bulb symbolizes | 28 |
| What a light bulb sometimes signifies | 37 |
| What a light bulb might symbolize | 33 |
| What a light bulb may signify | 29 |
| What a germ can become | 22 |
| Unseen flash | 12 |
| Toon light | 10 |
| Thought hidden in eight long puzzle answers | 43 |
| Thought sometimes | 18 |
| Thinktank product | 17 |
| Think-tank offering | 19 |
| Think-tank nugget | 17 |
| Think-tank creation | 19 |
| Think tank topic | 16 |
| Think tank matter | 17 |
| Think of it? | 12 |
| Think of it | 11 |
| Thesis basis | 12 |
| Theorem or noumenon | 19 |
| The very notion | 15 |
| The very beginning of an invention | 34 |
| The very ___! | 13 |
| The thinker's reward | 24 |
| The origin of an invention | 26 |
| Sudden mental inspiration | 25 |
| Sudden inspiration | 18 |
| Sudden bright thought | 21 |
| Starting point, perhaps | 23 |
| Start of something big, perhaps | 31 |
| Start of a theory | 17 |
| Start of a project | 18 |
| Start of a plot | 15 |
| Start of a novel? | 17 |
| Stars : pain :: light bulb : _____ | 34 |
| Spark, so to speak | 18 |
| Spark result | 12 |
| Song light bulb | 15 |
| Song concept | 12 |
| Something to think up | 21 |
| Something thought up | 20 |
| Something that comes to mind | 28 |
| Something that can't be patented | 36 |
| Something on your mind | 22 |
| Seed for a lyric | 16 |
| Result of some brainstorming | 28 |
| Result of ruminating | 20 |
| Result of cerebral activity | 27 |
| Result of brainstorming, at times | 33 |
| Puzzlemaker's beginning | 27 |
| Project's basis | 19 |
| Project starter | 15 |
| Productive thought | 18 |
| Product of the imagination | 26 |
| Product of reflection | 21 |
| Product of imagination | 22 |
| Product of cogitation | 21 |
| Problem solver, perhaps | 23 |
| Prelude to a plot | 17 |
| Prelude to a patent | 19 |
| Potential solution | 18 |
| Possible outcome of a brown study | 33 |
| Plan not yet on paper | 21 |
| Plan for action | 15 |
| People see it when the lights turn on | 37 |
| Patent seed | 11 |
| Patent prerequisite | 19 |
| Patent predecessor | 18 |
| Overhead light bulb? | 20 |
| Overhead exclamation point, in comics | 37 |
| Orson: "Bright ___" | 29 |
| Orson "Bright ___" | 28 |
| One may be big or bright | 24 |
| One could eventually lead to a patent | 37 |
| On-bulb, symbolically | 21 |
| Noumenon | 8 |
| Noodle output? | 14 |
| Noodle nugget | 13 |
| Noodle filler? | 14 |
| Noodle concoction | 17 |
| New slant | 9 |
| Mount ___ (Crete's highest peak) | 36 |