Crossword Genius

He's flashy, perhaps, but efficient (5)

Ross

I believe the answer is:

robot

I'm a little stuck... Click here to teach me more about this clue!

'he's flashy perhaps but efficient' is the definition.
Although both the answer and definition are singular nouns, I can't understand how one could define the other.

'he's' is the wordplay.
I cannot quite see how this works, but
'he' could be 'rob' and 'rob' is found in the answer.
The remaining letters 'ot' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for robot that I've seen before include "Programmable machine" , "Automatic worker?" , "Factory worker, perhaps" , "Automaton or sci-fi creature" , "Humanoid machine" .)

I've seen this clue in the Evening Standard.
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