Toddler's Tantrum or Nuclear Accident
This page is the CodyCross answer for the clue below from Train Travel, Group 713, Puzzle 3 (Overhead Wires).
Question is: Toddler's Tantrum or Nuclear Accident
and the answer is: MELTDOWN
Word Meaning:
MELT DOWN — (transitive) To melt fully, especially metal or glass so that it can be remade into something else.
Definitions from Wiktionary.