City sleeps around lunchtime, empty (6)
I believe the answer is:
naples
'city' is the definition.
(Naples is an example)
'sleeps around lunchtime empty' is the wordplay.
'sleeps' becomes 'naps' (napping is a kind of sleeping).
'around' means one lot of letters goes inside another.
'empty' means to remove the middle letters.
'lunchtime' with its middle removed is 'le'.
'naps' enclosing 'le' is 'NAPLES'.
(Other definitions for naples that I've seen before include "Italian city of the planes" , "Italian port blockaded by Nelson" , "Mediterranean city" , "City near Mt. Vesuvius" , "Planes (anag) - somewhere in Italy" .)