Crossword Genius

Amount of data from most of sample (5)

Ross

I believe the answer is:

bytes

'amount of data' is the definition.

'from most of sample' is the wordplay.
'from' becomes 'by'.
'most of' means to remove the last letter.
'sample' becomes 'test' (I've seen this before).
'test' with its final letter taken away is 'tes'.
'by'+'tes'='BYTES'

(Another definition for bytes that I've seen is " Computer memory units".)

I've seen this clue in The Independent.
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