Bomb-makers here chopped sausage found in lavatories (3,6)

'bomb-makers here chopped sausage found in lavatories' is the definition.
The definition suggests a singular noun which matches the answer.

'bomb-makers here chopped sausage found in' is the wordplay.
'bomb makers here' becomes 'loos' (I can't explain this - if you can you should give a lot more credence to this answer).
'chopped' means to remove the last letter (the final letter is chopped off).
'sausage' becomes 'salami' (salami is a kind of sausage).
'found in' is an insertion indicator.
'salami' with its final letter taken away is 'salam'.
'loos' going around 'salam' is 'LOS ALAMOS'.

Can you help me to learn more?