| Clue | Source | Date |
|---|---|---|
| Attack imaginary enemies or evils (4,2,9) | ||
| Fight an imaginary enemy (4,2,9) | ||
| Fight imaginary foes | Newsday | 11 Nov 2020 |
| *Fight imaginary enemies | New York Times | 07 Nov 2018 |
| *Fight imaginary enemies | ||
| Battle imaginary enemies | Newsday | 23 Dec 2015 |
| Battle imaginary enemies | ||
| Fight imaginary foes | ||
| Play pinball la the Dutch? | ||
| Flunk out at derring-do | ||
| Do an exercise in futility | ||
| Be quixotic. | ||
| Fight imaginary opponents. |