System for better conclusions in report, so not futile (4)
I believe the answer is:
tote
'system for better' is the definition.
(betting terminology, so a system for a bett-er)
'conclusions in report so not futile' is the wordplay.
'conclusions in' suggests the final letters.
The final letters of 'report so not futile' are 'TOTE'.
(Other definitions for tote that I've seen before include "System of betting on horse races" , "system for betters" , "Horse race betting system" , "Wield or carry something heavy" , "Transfer" .)