Devious computing (11)

I believe the answer is:

calculating

I believe this clue is a double definition.

'devious' is the first definition.
('calculating' can be a synonym of 'devious')

'computing' is the second definition.
('calculate' can be a synonym of 'compute')

(Another definition for calculating that I've seen is " Scheming".)

I've seen this clue in The Telegraph.

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