Crossword Genius

Computer device doctor has to operate (5)

Ross

I believe the answer is:

mouse

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

'doctor has to operate' is the wordplay.
'doctor' becomes 'mo' (medical officer**).
'has' is a charade indicator (letters next to each other).
'to operate' becomes 'use' (I've seen this before).
'mo'+'use'='MOUSE'

(Other definitions for mouse that I've seen before include "Small rodent - computer device" , "Wimp" , "shy and timid type" , "computer operator" , "black eye" .)

I've seen this clue in The Telegraph.
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