Bottle in restaurant, catching the sun (6)
I believe the answer is:
carafe
'bottle' is the definition.
(carafe is a kind of bottle)
'restaurant catching the sun' is the wordplay.
'restaurant' becomes 'cafe' (cafe is a kind of restaurant).
'catching' indicates putting letters inside.
'the sun' becomes 'ra' (ancient Egyptian sun god).
'cafe' enclosing 'ra' is 'CARAFE'.
'in' is the link.
(Other definitions for carafe that I've seen before include "Serving vessel for water or wine" , "Glass water jug" , "Open-topped glass container" , "Wine server" , "It may provide drink" .)