What does the cryptic crossword clue "1-0 for United (2,3)" mean?

The definition is "United". The wordplay uses a charade (building blocks). INONE (synonym of "1-0 for"); definition: "United" The answer is INONE.

1-0 for United (2,3)

Guardian Cryptic #29638 | 21 Across | 2025-03-10 flower