| BLUEPETER | Maritime signal flag meaning out ward bound (4,5) |
| CONVEX | Curving out wards (6) |
| PETER | Blue _; maritime signal flag (5) |
| ALPHA | Scuba flag meaning "diver down"; or, the first letter of the Greek alphabet (5) |
| TRUCE | White flag meaning |
| ONELAP | White flag's meaning, at the Indy 500 |
| SOS | Maritime signal that means "Help!" |
| BLUE | Signal flag displayed by a vessel about to leave port (4,5) |
| ENIGMA | Puzzle meaning out once the North has gone (6) |
| OFFTHEHOOK | Phrase meaning 'out of a difficult situation' (3,3,4) |
| DOGHOUSE | In the ____ , colloquial phrase meaning 'out of favour' or 'in disgrace' (8) |
| INTHEDOGHOUSE | Informal expression meaning 'out of favour' (2,3,8) |
| OLDHAT | Phrase meaning out-of-date, outmoded or "vieux jeu" (3-3) |
| DEPROFUNDIS | Latin name of Psalm 130, meaning 'out of the depths' (2,9) |
| EXTRO | Prefix meaning 'out from' (5) |
| FORTHESAKEOF | Phrase meaning 'out of regard for' (3,3,4,2) |
| HOIST | Signal flags, at sea |
| YELLOW | In signal flags, what colour denotes the letter Q? (6) |
| EXNIHILO | Latin phrase meaning 'out of nothing', often used in the context of divine creation (2,6) |
| EPLURIBUSUNUM | Traditional motto on the U.S. coat of arms, meaning 'out of many, one' (1,8,4) |
