Clue: Battery stuff

Answer: ACID

Length: 4

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Similar Clues:

• Soft stuff found in this puzzle's four longest Across entries (NERF with 4 letters)
• Battery post (ANODE with 5 letters)
• Surfacing stuff (TAR with 3 letters)
• Battery symbol (PLUS with 4 letters)
• Five alarm stuff (CHILI with 5 letters)
• Electric-battery inventor (VOLTA with 5 letters)
• Stuff in a bomb (AMATOL with 6 letters)
• Bottom-of-barrel stuff (DREGS with 5 letters)
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• Stuff from which life on Earth might have emerged (PRIMORDIALOOZE with 14 letters)