Crossword Genius

Miniature hamburger (6)

Ross

I believe the answer is:

slider

(Other definitions for slider that I've seen before include "Sir led (anag) - control mechanism" , "Eg, fader control" , "Control such as on a mixing desk" , "Control knob move up and down or sideways" , "American snack" .)

I've seen this clue in the Sydney Morning Herald.
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