Also confused over rocks originally from the sun (5)
I believe the answer is:
solar
'from the sun' is the definition.
(solar means relating to the sun)
'also confused over rocks originally' is the wordplay.
'confused' indicates anagramming the letters.
'over' says to put letters next to each other (in a down clue, some letters go over others).
'originally' indicates taking the first letters.
The first letter of 'rocks' is 'r'.
'also' anagrammed gives 'sola'.
'sola'+'r'='SOLAR'
(Other definitions for solar that I've seen before include "Using the energy of the sun" , "Particular star's" , "type of radiation" , "sunny?" , "revolutionary system" .)