The sort to do office work (4)
I believe the answer is:
type
I believe this is a double definition.
'the sort' is the first definition.
(type is a kind of sort)
'do office work' is the second definition.
(I've seen this in another clue)
'to' acts as a link.
(Other definitions for type that I've seen before include "Sort, kind" , "Kind - kind of writing" , "Stamp" , "Write using a keyboard" , "key" .)