Crossword Genius

Corkscrew-like form (5)

Ross

I believe the answer is:

helix

(Other definitions for helix that I've seen before include "Screwed coil" , "Spiral (maybe double)" , "Spiral shape" , "Intertwining with another" , "that goes round and round and up and down" .)

I've seen this clue in The Times.
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