Attempting to include short-time worker (4)
I believe the answer is:
temp
'short-time worker' is the definition.
(I've seen this before)
'attempting to include' is the wordplay.
'to include' indicates the answer is hidden within the clue.
'TEMP' is hidden in the letters of 'attempting'.
(Other definitions for temp that I've seen before include "Short-term office worker" , "N on-permanent worker" , "Non-full time employee" , "Casual worker" , "Transient office worker" .)