Key worker tipsy: drunk after time (6)
I believe the answer is:
typist
'key worker' is the definition.
(I've seen this before)
'tipsy drunk after time' is the wordplay.
'drunk' is an anagram indicator.
'after' says to put letters next to each other.
'time' becomes 't' (abbreviation).
'tipsy' is an anagram of 'typis'.
'typis'+'t'='TYPIST'
(Other definitions for typist that I've seen before include "Person at keyboard" , "One using keyboard" , "Operator of a machine that prints one character at a time" , "Stenographer" , "Forerunner of the word processor operator" .)