What does the cryptic crossword clue "Stud manager (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.

Stud manager (4)

Telegraph #30066 | 12 Across | 2022-08-15 flower

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Also seen in

Guardian Cryptic #22262 (2001-07-16)