Smile brings some light (4)
This clue is a double definition.
'smile' is the first definition.
(beaming is a kind of smiling)
'some light' is the second definition.
(beam is a kind of light)
'brings' is the link.
(Other definitions for beam that I've seen before include "Column of light", "XWD SETTER", "Rafter - smile - width", "Ray of light or a large smile", "Smile radiantly".)