Crossword Genius

Red Dwarf's leading actor? (4)

Ross

I believe the answer is:

star

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This clue might be a double definition.

'red dwarf's' is the first definition.
The definition and answer can be both natural objects as well as being singular nouns.
Maybe there's a link between them I don't understand?

'leading actor?' is the second definition.
(I've seen this in another clue)

Can you help me to learn more?

(Other definitions for star that I've seen before include "Screen idol" , "Eg, Antares" , "Hollywood figure" , "Celebrity in the world of entertainment" , "Eg, Rigel, Aldebaran" .)

I've seen this clue in The Telegraph.
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