Everyone that's left has finished (3,4)
I believe the answer is:
all over
'finished' is the definition.
(similar in meaning)
'everyone that's left' is the wordplay.
'everyone' becomes 'all' (all people).
'that's left' becomes 'over' (I've seen this before).
'all'+'over'='ALL OVER'
'has' acts as a link.
(Other definitions for all over that I've seen before include "covering everything" , "Excessively attentive" , "Everywhere (bar the shouting?)" , "typically" , "Obsessed with" .)