Lets it break to a point that could be lethal (8)
I believe the answer is:
stiletto
'a point that could be lethal' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'lets it break to' is the wordplay.
'break' indicates anagramming the letters.
'lets'+'it'='letsit'
'letsit' anagrammed gives 'stilet'.
'stilet'+'to'='STILETTO'
Can you help me to learn more?
(Other definitions for stiletto that I've seen before include "Type of shoe" , "Sort of knife" , "Pointed arm" , "Tapering dagger" , "Small dagger and high narrow heel" .)