Crossword Genius

Behave strangely when one goes off them? (5)

Ross

I believe the answer is:

rails

(Other definitions for rails that I've seen before include "For trains" , "Water birds" , "Metal bars of a barrier" , "Makes a protest" , "Wading birds - dysfunctional person has come off them" .)

I've seen this clue in The Guardian.
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