| Clue | Source | Date |
|---|---|---|
| Plant pipe | ||
| ___ industries, heavy manufacturers | Puzzler Backwords | 23 Sep 2024 |
| Around Stoke, nasty trace from this source of industrial pollution | ||
| Steam locomotive feature | USA Today | 26 Mar 2017 |
| Steam locomotive feature | ||
| Fine established for breaking fishing vessel's funnel | The Times Cryptic | 21 Jul 2015 |
| A fuming column? | The Telegraph Cryptic | 12 Mar 2015 |
| Factory feature | ||
| Feature of an old cruise ship | ||
| Symbol of pollution | ||
| Heavy-industry | ||
| Factory outlet | ||
| Factory outlet | ||
| Feature of old cruise ships and locomotives | ||
| Factory tower | ||
| Factory sight | ||
| Factory feature | ||
| Urban polluter | ||
| Image used in anti-pollution ads |