| DIURNAL | Active during the day |
| BUTTERFLY | Lepidopteran with large, colourful wings that is active during the day, or type of swimming stroke (9) |
| AIRAMERICA | Civilian airline set up by the CIA, active during the Vietnam War (3,7) |
| NOCTURNAL | Active during the night (9) |
| MACHINEGUN | --- --- Kelly, American gangster active during the Prohibition era (7,3) |
| NIGHTHAWK | Person who likes to be most active during the hours of darkness (9) |
| KELLY | Machine Gun _, American gangster active during the Prohibition era (5) |
| UNICEF | Charity quite active during Halloween |
| PACS | Orgs. active during elections |
| INPLAY | Active during a game |
| NIGHTOWL | One habitually active during late hours (5,3) |
| SCAPAFLOW | Naval base in Orkney, active during both world wars |
| SWEATGLAND | One of those active during strenuous exercise was tangled in knots (5,5) |
| VERTICAL | The anecic group form deep, permanent and ___ tunnels within the soil during the day and surface during the night to feed on plant matter. |
| DAIRY | Where, during the day, the tax people get the cream? |
| DELAY | Hold up the Parisian on the way up during the day |
| INCUBATES | Male pigeons ___ the eggs during the day and the female takes over at night |
| PROTECTS | They have a thick coat which ___ them from the heat during the day and keeps them warm during those cold desert nights. |
| NAP | Hit the hay during the day |
| MATINEEIDOLS | Can be seen during the day on solid ground provided they are recognizable from the pictures (7,5) |
