Reduced share (3)
I believe the answer is:
cut
This clue is a double definition.
'reduced' is the first definition.
(I've seen this before)
'share' is the second definition.
(cut is a kind of share)
(Other definitions for cut that I've seen before include "Sever, slice" , "Wounded" , "Cold-shoulder" , "Fail to attend" , "what hackers do" .)