Everyone left everywhere (3,4)
I believe the answer is:
all over
'everywhere' is the definition.
(synonyms)
'everyone left' is the wordplay.
'everyone' becomes 'all' (all people).
'left' becomes 'over' (I've seen this before).
'all'+'over'='ALL-OVER'
(Other definitions for all over that I've seen before include "very characteristically" , "Excessively attentive" , "typically" , "Obsessed with" , "Everywhere (bar the shouting?)" .)