Throw away or cast off (7)
I believe the answer is:
discard
I believe this is a double definition.
'throw away' is the first definition.
(I know that throw away can be written as discard)
'cast off' is the second definition.
(thesaurus)
(Other definitions for discard that I've seen before include "Get rid of" , "Abandon" , "Throw away or cast off" , "Jettison" , "Shed" .)