Office workers, tipsy, stumbling across street (7)
I believe the answer is:
typists
'office workers' is the definition.
'tipsy stumbling across street' is the wordplay.
'stumbling' indicates anagramming the letters.
'across' indicates putting letters inside.
'street' becomes 'st'.
'tipsy' is an anagram of 'typis'.
'typis' enclosing 'st' is 'TYPISTS'.
(Other definitions for typists that I've seen before include "Keyboard operators" , "They operate character printers" , "short of key players" .)