Ray reportedly sleeps with a smile (5,4)
I believe the answer is:
laser beam
'ray reportedly' is the definition.
'laser beam' can be an answer for 'ray' (I've seen this before). I am unsure of the 'reportedly' bit.
'sleeps with a smile' is the wordplay.
'sleeps with' becomes 'laser' (I can't explain this - if you can you should give a lot more credence to this answer).
'a smile' becomes 'beam' (to beam is to smile).
'laser'+'beam'='LASER BEAM'
Can you help me to learn more?
(Other definitions for laser beam that I've seen before include "Column of intensified light" , "penetrating light" , "Intense ray of light" , "Shaft of light or electro-mechanic radiation" , "Shaft of light or electromagnetic radiation" .)