Immediately assists, maybe? (4)
I believe the answer is:
stat
I believe this is a double definition.
'immediately' is the first definition.
(stat can informally mean at once)
'assists maybe?' is the second definition.
(I've seen this in another clue)
(Other definitions for stat that I've seen before include "Photocopy" , "Might it control warmth" , "copy" , "figure used in estimates" , "Doctor's immediately" .)