Data entry clerk (6)
I believe the answer is:
typist
'data entry clerk' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for typist that I've seen before include "Operator of a machine that prints one character at a time" , "Forerunner of the word processor operator" , "One using keyboard" , "Key worker" , "Old secretary" .)