Crossword Genius

Run unhindered, changing hands (4)

Ross

I believe the answer is:

flee

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'run' is the definition.
(I've seen this before)

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for flee that I've seen before include "Run quickly away" , "Turn tail" , "retreat" , "Abscond" , "Cut and run" .)

I've seen this clue in The Telegraph.
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