Deserve to be cut off (7)
I believe the answer is:
severed
'cut off' is the definition.
(synonyms)
'deserve to be' is the wordplay.
'to be' is an anagram indicator.
'deserve' with letters rearranged gives 'SEVERED'.
(Other definitions for severed that I've seen before include "parted" , "Bisected" , "Detached" , "Deserve (anag.)" , "Cut in two" .)