Ingenious devices, good stopping terrible tragedy (8)
I believe the answer is:
gadgetry
'ingenious devices' is the definition.
(I've seen this before)
'good stopping terrible tragedy' is the wordplay.
'good' becomes 'g' (abbreviation).
'stopping' is an insertion indicator (stopping can mean blocking a gap).
'terrible' indicates an anagram.
'tragedy' with letters rearranged gives 'gadetry'.
'g' inserted into 'gadetry' is 'GADGETRY'.
(Other definitions for gadgetry that I've seen before include "Small ingenious devices in general" , "The making of small ingenious devices" , "gismos" , "Mechanical tools" .)