Heavenly article on organic compounds (9)
I believe the answer is:
asteroids
'heavenly article on organic compounds' is the definition.
I can't judge whether this definition defines the answer.
'heavenly article on organic compounds' is the wordplay.
'heavenly article' becomes 'a' (the indefinite article in English. I am not sure about the 'heavenly' bit.).
'on' is a charade indicator (letters next to each other) (in a down clue, letters appear on others).
'organic compounds' becomes 'steroids' (steroid is a kind of organic compound).
'a'+'steroids'='ASTEROIDS'
Can you help me to learn more?
(Other definitions for asteroids that I've seen before include "Small planets orbiting the sun" , "Small celestial bodies that move around the sun" , "Do satires address small planets?" , "Heavenly bodies" , "lumps of rock" .)