I'd interrupted to stress a chancy outcome (8)
I believe the answer is:
accident
'a chancy outcome' is the definition.
The definition and answer can be both related to natural events as well as being singular nouns.
Maybe there's a link between them I don't understand?
'i'd interrupted to stress' is the wordplay.
I cannot quite see how this works, but
'i'd' could be 'id' and 'id' is located in the answer.
'stress' could be 'accent' (accent can mean to emphasise or stress) and 'accent' is found within the remaining letters.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for accident that I've seen before include "Fortune" , "Calamity" , "Contretemps" , "fluke" , "Chance event with no apparent cause" .)