| AIRAMERICA | Civilian airline set up by the CIA, active during the Vietnam War (3,7) |
| CATHAY | Hong Kong's airline, set up as a passenger and cargo service with just two DC-3s in 1946, ... Pacifi |
| MACHINEGUN | --- --- Kelly, American gangster active during the Prohibition era (7,3) |
| ROADBLOCKS | Barriers set up by the authorities on public highways to stop and examine traffic (10) |
| MISSSAIGON | *Musical set during the Vietnam War |
| SWEATGLAND | One of those active during strenuous exercise was tangled in knots (5,5) |
| VIETCONG | Name by which the National Liberation Front for South Vietnam was known during the Vietnam War (8) |
| AGENTORANGE | Common name for the toxic defoliant used by the US military during the Vietnam War |
| SAIGON | Miss ___, musical set during the Vietnam War and based on the opera Madame Butterfly (6) |
| DIURNAL | Mostly active during the day. They are known to hunt during a full moon. |
| BALLAD | A place for scientists set up by the foreign director in the fields of Athenry (6) |
| EEC | Institution of the EU set up by the Treaty of Rome (3) |
| ORANGE | Highly poisonous herbicide used as a spray for defoliation and crop destruction by the US during the Vietnam War (5.6) |
| AGENT | Highly poisonous herbicide used as a spray for defoliation and crop destruction by the US during the Vietnam War (5.6) |
| AIR | CIA cargo and personnel-moving venture in southeast Asia during the Vietnam War era, ... America |
| PLATOON | One of Oliver Stone's films set during the Vietnam War (7) |
| APOCALYPSENOW | American film set during the Vietnam War (10,3) |
| BUTTERFLY | Lepidopteran with large, colourful wings that is active during the day, or type of swimming stroke (9) |
| 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) |
