Figure from report incomplete (4)
I believe the answer is:
stat
'figure' is the definition.
(I've seen this before)
'report incomplete' is the wordplay.
'report' becomes 'state'.
'incomplete' means to remove the last letter.
'state' with its final letter removed is 'STAT'.
'from' acts as a link.
(Other definitions for stat that I've seen before include "figure used in estimates" , "accepted numerical fact" , "Doctor's immediately" , "Might it control warmth" , "copy" .)