City from which manservant comes back before four (3,4)
I believe the answer is:
tel aviv
'city' is the definition.
(Tel Aviv is an example)
'manservant comes back before four' is the wordplay.
'manservant' becomes 'valet' (valet is a kind of manservant).
'comes back' says the letters should be written in reverse.
'before' means one lot of letters go next to another.
'four' becomes 'iv' ('IV' can be a synonym of 'four').
'valet' backwards is 'telav'.
'telav'+'iv'='TEL AVIV'
'from which' acts as a link.
(Other definitions for tel aviv that I've seen before include "Israeli city on the Mediterranean" , "Financial centre of Israel" , "Second largest city of Israel" , "city on the Mediterranean coast" , "Capital of Israel" .)