Completely finished with a Latin paramour (3,4)
I believe the answer is:
'completely finished' is the definition.
(I've seen this before)
'with a latin paramour' is the wordplay.
'with' means one lot of letters go next to another.
'latin' becomes 'l'.
'paramour' becomes 'lover' (I've seen this before).
'a'+'l' is 'al'.
(Other definitions for all over that I've seen before include "Everywhere (bar the shouting?)" , "Finished" , "Obsessed with" , "very characteristically" , "typically" .)