Crossword Genius

Excessively shortened screwdriver, perhaps (3)

Ross

I believe the answer is:

too

'excessively' is the definition.
('too' can be a synonym of 'excessively')

'shortened screwdriver perhaps' is the wordplay.
'shortened' means to remove the last letter.
'screwdriver perhaps' becomes 'tool' (screwdriver is a kind of tool).
'tool' with its final letter taken off is 'TOO'.

(Other definitions for too that I've seen before include "Excessively" , "On top - also" , "Also; overly" , "Additionally" , "Likewise" .)

I've seen this clue in The Times.
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