The Sun is very famous (4)
I believe the answer is:
star
This might be a double definition.
'the sun' is the first definition.
(I've seen this before)
'very famous' is the second definition.
'star' can be an answer for 'famous' (I've seen this before). I am not sure about the 'very' bit.
'is' is the link.
Can you help me to learn more?
(Other definitions for star that I've seen before include "Possible Christmas tree topper?" , "Cult sci-fi film" , "Outstanding person" , "Heavenly body - leading actress?" , "Sign of a leading performer" .)