Office worker with current Times (5)
I believe the answer is:
tempi
'times' is the definition.
(tempo is a kind of time)
'office worker with current' is the wordplay.
'office worker' becomes 'temp' (temporary worker in an office).
'with' means one lot of letters go next to another.
'current' becomes 'I' (symbol for electric current).
'temp'+'i'='TEMPI'
(Other definitions for tempi that I've seen before include "Times" , "Speeds for musicians" , "Rates" , "Speeds, rhythms of musical pieces" , "Speeds (music)" .)