Crossword Genius

Calculating time worked over the years (6)

Ross

I believe the answer is:

shifty

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'calculating' is the definition.
(thesaurus)

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(Other definitions for shifty that I've seen before include "Evasive, sneaky" , "Suspicious-looking" , "Sly, shady" , "Furtive" , "Constantly changing; deceitful, evasive" .)

I've seen this clue in the Sydney Morning Herald.
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