Crossword Genius

Entrance with pipes passing back (5)

Ross

I believe the answer is:

debut

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

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for debut that I've seen before include "entrance" , "The coming out of a society girl" , "Aurora" , "Start -- launch" , "First appearance, a coming-out" .)

I've seen this clue in The Times.
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