Sitcom star (3,5)
This clue might be a double definition.
'sitcom' is the first definition.
Although both the answer and definition are singular nouns, I don't see how they can define each other.
'star' is the second definition.
(I know that red dwarf is a type of star)
Can you help me to learn more?
(Other definitions for red dwarf that I've seen before include "Small, cool star - TV show" , "Small old cooling star" , "Old cool star" .)
(Other definitions for actor that I've seen before include "Thesp" , "One in a play" , "Gielgud, say" , "For example, Colman" , "ham" .)