What does the cryptic crossword clue "Wildly inaccurate footballers’ big defeat (3,3)" mean?

The wordplay uses a charade (building blocks). FA (synonym="Football Association") + ROUT (synonym="big defeat") = FAROUT The answer is FAROUT.

Wildly inaccurate footballers’ big defeat (3,3)

Guardian Cryptic #29543 | 18 Down | 2024-11-18 flower