Star side beaten by total accident (8)
I believe the answer is:
disaster
'total accident' is the definition.
'disaster' can be an answer for 'accident' (disaster is a kind of accident). I am unsure of the 'total' bit.
'star side beaten' is the wordplay.
'beaten' indicates anagramming the letters.
'star'+'side'='starside'
'starside' with letters rearranged gives 'DISASTER'.
'by' acts as a link.
Can you help me to learn more?
(Other definitions for disaster that I've seen before include "Great tradegy or cataclysm" , "Calamity, tragedy" , "terrible trouble" , "Extreme event resulting in great loss and misfortune" , "complete failure" .)