Crossword Genius

Rod will do a swap with you (6)

Ross

I believe the answer is:

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

I can't explain the remainder of the clue.

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(Other definitions for switch that I've seen before include "Change or cane", "Sudden quick change", "Exchange positions for flexible rod or whip", "Exchange; contactor", "Contact maker or breaker".)