Key worker in office? (6)
I believe the answer is:
typist
'key worker' is the definition.
(I've seen this before)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for typist that I've seen before include "Pre-computer office worker" , "Keyboard user" , "Someone paid to copy using a keyboard" , "Stenographer" , "Old secretary" .)