Keyboard user (6)
I believe the answer is:
typist
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">keyboard user</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for typist that I've seen before include "Operator of a machine that prints one character at a time" , "Person at keyboard" , "The old-style secretary, for one" , "Worker taken from pool, perhaps" , "Keyboard operator" .)