There's not so much about military intelligence in a musical, commonly (3)
'a musical commonly' is the definition.
(informal name for Les Miserables)
'there's not so much about military intelligence' is the wordplay.
'there's' is a charade indicator (letters next to each other).
'not so' becomes 'less' (I've seen this before).
'much' means to remove the last letter (much but not all of the word).
'about military intelligence' becomes 'mis' (I am not sure about this - if you are sure you should believe this answer much more).
'less' with its last letter taken off is 'les'.
'les'+'mis' is 'LES MIS'.
'in' acts as a link.
Can you help me to learn more?
'military intelligence in a musical commonly' is the definition.
I can't tell whether this defines the answer.
'there's not so much' is the wordplay.
'there's' is a charade indicator (letters next to each other).
'not' becomes 'le' (I can't justify this - if you can you should give a lot more credence to this answer).
'much' means to remove the last letter (much but not all of the word).
'so' with its last letter taken away is 's'.
'le' put next to 's' is 'LES'.
'about' acts as a link.
(Other definitions for les that I've seen before include "-- Dawson (late comedian)" , "-- Dawson, English comic" , "French definite article" , "Boy's name (abbr)" , "French article; name" .)