Boring people make this missile after bomb (9)
I believe the answer is:
mineshaft
'boring people make this missile after bomb' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Perhaps you can see an association between them that I can't see?
'missile after bomb' is the wordplay.
'missile' becomes 'shaft' (I can't explain this - if you can you should give a lot more credence to this answer).
'after' says to put letters next to each other.
'bomb' becomes 'mine' (I've seen this before).
'shaft' put after 'mine' is 'MINESHAFT'.
Can you help me to learn more?
(Other definitions for mineshaft that I've seen before include "one's got bored" , "Vertical hole" , "not a feature of 4, 21 [OPENCAST MINING]" .)