Introducing AI to disastrous event shows ingenuousness (7)
I believe the answer is:
naivete
'ingenuousness' is the definition.
(I've seen this in another clue)
'introducing ai to disastrous event' is the wordplay.
'introducing' means one lot of letters goes inside another (some letters introduced or inserted into others).
'to disastrous' is an anagram indicator.
'event' is an anagram of 'nvete'.
'ai' put into 'nvete' is 'NAIVETE'.
'shows' is the link.
(Other definitions for naivete that I've seen before include "Ingenuosity" , "Innocence, artlessness" , "Quality of innocent gullibility" , "lack of experience" , "State of inexperience (French spelling)" .)