Special forces tired out containing catastrophe (8)
I believe the answer is:
disaster
'catastrophe' is the definition.
(synonyms)
'special forces tired out containing' is the wordplay.
'special forces' becomes 'sas' (I've seen this in other clues).
'out' indicates an anagram (out can mean wrong or inaccurate).
'containing' is an insertion indicator.
'tired' with letters rearranged gives 'diter'.
'sas' placed into 'diter' is 'DISASTER'.
(Other definitions for disaster that I've seen before include "Star dies (anag)" , "complete failure" , "Tragedy of asterids" , "Calamity, sudden great misfortune" , "Extreme event resulting in great loss and misfortune" .)