What does the cryptic crossword clue "Lightning run (4)" mean?

This cryptic clue uses wordplay to arrive at the answer. Visit the page for progressive hints — definition, wordplay type, and a full step-by-step explanation.

Lightning run (4)

Telegraph #30197 | 12 Across | 2023-01-14 flower

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Also seen in

Guardian Cryptic #24606 (2009-01-26)