Bored concealing power provided by working munitions (8)
I believe the answer is:
weaponry
'munitions' is the definition.
(thesaurus)
'bored concealing power provided by working' is the wordplay.
'bored' becomes 'weary' (I can't justify this - if you can you should believe this answer much more).
'concealing' is an insertion indicator.
'power' becomes 'p' (symbol in physics).
'provided by' says to put letters next to each other.
'working' becomes 'on' (on can mean working or activated).
'p'+'on'='pon'
'weary' going around 'pon' is 'WEAPONRY'.
Can you help me to learn more?
(Other definitions for weaponry that I've seen before include "Armaments collectively" , "Arsenal" , "All one's arms" , "Big guns" , "Arms in general" .)