Crossword Genius

Computer operator who gets trapped (5)

Ross

I believe the answer is:

mouse

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

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for mouse that I've seen before include "Quiet type" , "black eye" , "Small creature" , "Squeaky creature" , "PC device" .)

I've seen this clue in The Globe and Mail.
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