They get what's left (8)
I believe the answer is:
legatees
'they' is the definition.
Both the definition and answer are plural nouns.
Maybe you can see a link between them that I can't see?
'what's left' is the wordplay.
I cannot really see how this works, but
'left' could be 'leg' (left leg) and 'leg' is found within the answer.
This may be the basis of the clue (or it may be nonsense).
'get' acts as a link.
Can you help me to learn more?
(Other definitions for legatees that I've seen before include "they inherit" , "They have received bequests in wills" , "They receive bequests under a will" .)