| CHEMICALWARFARE | A toxic campaign that affects the atmosphere for most of those in 24 across following 14 across and 2 down (8,7) |
| OZONE | With love three can affect the atmosphere (5) |
| SATNAV | Took a seat for most of those overseas - it's the talk of the town on TripAdvisor (3,3) |
| IRIS | That's one in the eye for most of those on the island (4) |
| THROTTLE | A device or pedal in a motor vehicle that affects the amount of fuel entering the engine (8) |
| DOUBLEV | W.W. II-era campaign that helped usher in the civil rights movement ... and a hint to four answers in this puzzle |
| DIAMONDS | De Beers slogan for the campaign that put these precious gems back at the forefront of fashion, "... |
| REDEYE | Unwanted effect in photography that affects the colour of the subject's pupils (3,3) |
| TACTIC | Scheme set-up for most of those in Los Angeles, California starting therapy (6) |
| TROPICAL | Very hot oppressive atmosphere for Spring, for instance, in the news over resistance (8) |
| SUNBLOCK | Beach trip essential, or any of three squares in this grid that affects the starred clues' answers? |
| PALLADIUM | Gloomy atmosphere for the family in a dark London theatre (9) |
| NIGERIA | Atmosphere, for example, in uprising in part of Africa |
| WRAITH | Word with misty origins, whether from a "guardian" or a "writhing" spirit, that has perfectly maintained its spooky atmosphere for some 500 years to refer to an apparition, ghost or spectral wisp (6) |
| COLD | Common virus that affects the nose and throat and has no known cure |
| BSE | A fatal disease of cattle that affects the central nervous system. |
| LEUKAEMIA | Type of cancer that affects the blood and bone marrow (9) |
| SEO | Process that affects the visibility of a website say: Abbr. |
| ASTHMA | Chronic condition that affects the airways in the lungs (6) |
| RUN | Campaign that may be a result of batsmen crossing over (3) |
