What does the cryptic crossword clue "Risky moment to discard jack (4)" mean?

The definition is "Risky". The wordplay uses a deletion. IFFY (deletion) = IFFY; definition: "Risky" The answer is IFFY.

Risky moment to discard jack (4)

Guardian Cryptic #29557 | 10 Across | 2024-12-04 flower