Decide not to toss (4)

I believe the answer is:
keep
(Other definitions for keep that I've seen before include "Retain or care for" , "Conserve" , "Look after" , "Hold - fortress" , "Eg, beef" .)
I believe the answer is:
keep
(Other definitions for keep that I've seen before include "Retain or care for" , "Conserve" , "Look after" , "Hold - fortress" , "Eg, beef" .)