| Harmful material for a superhero; or an Achilles heel, colloquially |
The Times Specialist Sunday |
10 Aug 2025 |
| Fictional poison pretty OK in novel (10) |
The Guardian Cryptic |
02 Apr 2025 |
| Allusion to describe someone's weakness that is Superman's bane |
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| Weakness of Superman |
TV |
07 Apr 2024 |
| Green ___ (Superman's mineral weakness) |
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| Green __ (Superman's mineral weakness) |
Newsday |
18 Mar 2024 |
| Superman's nemesis, they say, is an evening with tricky crossword clues (10) |
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| Roy kept tin damaged by what Superman feared most (10) |
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| Superman's weakness |
USA Today |
01 Feb 2024 |
| 2000 song by 3 Doors Down whose title is inspired by Superman's weakness |
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| Immigration of unknown number into 15 port, I gathered — is that feared by 15? |
The Guardian Cryptic |
18 Aug 2022 |
| *“Superman” |
Wall Street Journal |
03 Feb 2021 |
| Mineral avoided by Superman |
The Times Concise |
10 Dec 2019 |
| Alien material we hear of in vault this evening |
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| Fear of superhero being OK in pretty pants |
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| One's undoing, in slang |
The Washington Post |
20 Jun 2016 |
| Only substance to which Superman is vulnerable |
The Telegraph General Knowledge |
15 Nov 2015 |
| Element in comic books since 1949 |
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| Superman's weakness |
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| Superhero's undoing |
New York Times |
31 Oct 2000 |
| Superhero's undoing |
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