What does the cryptic crossword clue "Stray dog's lead split (5)" 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.

Stray dog's lead split (5)

Telegraph #30007 | 24 Down | 2022-06-07 flower

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Also seen in

Times Cryptic #27652 (2020-04-30)