What does the cryptic crossword clue "Some achievement in whist, leading? You might blow it (3,7)" mean?

The wordplay uses a hidden word. hidden in (“Some” of): [achievemen]-T IN WHIST LE-[ading] The answer is TINWHISTLE.

Some achievement in whist, leading? You might blow it (3,7)

Guardian Cryptic #29489 | 2 Down | 2024-09-16 flower