Play for time, giving office worker zero increase (9)
I believe the answer is:
temporise
'play for time' is the definition.
'giving office worker zero increase' is the wordplay.
'giving' is a charade indicator (letters next to each other).
'office worker' becomes 'temp' (I've seen this before).
'zero' becomes 'o'.
'increase' becomes 'rise' (rise is a kind of increase**).
'temp'+'o' is 'tempo'.
'tempo'+'rise'='TEMPORISE'
(Other definitions for temporise that I've seen before include "Emptier so as to avoid giving a definite answer" , "Put off" , "Hedge" , "Delay" , "fail to decide" .)