Queen of Hollywood, one providing light entertainment? (5)
I believe the answer is:
laser
'light entertainment?' is the definition.
'laser' can be an answer for 'light' (lasers are a type of light). I am not certain of the 'entertainment?' bit.
'queen of hollywood one' is the wordplay.
'queen of hollywood' becomes 'las' (I am not sure about this - if you are sure you should believe this answer much more).
'one' becomes 'er' (I've seen this in other clues).
'las'+'er'='LASER'
'providing' is the link.
Can you help me to learn more?
(Other definitions for laser that I've seen before include "Source of intense beam" , "Device for concentrating light" , "Device that generates an intense ray of light" , "type of surgery" , "Coherent light source" .)