Crossword Genius

An aspect unaffected by the stars (8)

Ross

I believe the answer is:

sidereal

I'm a little stuck... Click here to teach me more about this clue!

'an aspect unaffected by the stars' is the definition.
I can't judge whether this definition defines the answer.

'an aspect unaffected by' is the wordplay.
'an aspect' becomes 'side' (side is a kind of aspect).
'unaffected' becomes 'real' (I've seen this before).
'by' is a charade indicator (letters next to each other).
'side'+'real'='SIDEREAL'

Can you help me to learn more?

(Other definitions for sidereal that I've seen before include "Of the stars or constellations" , "Like stars" , "Relating to the constellations" , "Of or measured by the stars" , "Realised (anag) -- relating to the stars" .)

I've seen this clue in The Globe and Mail.
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