Mishap I had when overwhelmed by stress (8)
I believe the answer is:
accident
'mishap' is the definition.
(I've seen this before)
'i had when overwhelmed by stress' is the wordplay.
'had when' becomes 'd' (I've seen this in other clues. I am not sure about the 'when' bit.).
'overwhelmed by' means one lot of letters goes inside another (I've seen this in other clues).
'stress' becomes 'accent' (synonyms).
'i'+'d'='id'
'id' put inside 'accent' is 'ACCIDENT'.
Can you help me to learn more?
(Other definitions for accident that I've seen before include "Unexpected incident" , "Chance occurrence." , "Unforeseen mishap" , "tragedy?" , "Unfortunate unintentional incident" .)