What does the cryptic crossword clue "Drop in velocity — could that be right? (5)" mean?

The definition is "Drop in". The wordplay uses a charade (building blocks). V (synonym="velocity") + IS (synonym="IS") + IT (synonym="could that be right?") = VISIT; definition: "Drop in" The answer is VISIT.

Drop in velocity — could that be right? (5)

Times Cryptic #28571 | 10 Across | 2023-04-07 flower

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