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 am not sure about this - if you are sure you should believe this answer much more).
'concealing' indicates putting letters inside.
'power' becomes 'p' (symbol in physics).
'provided by' means one lot of letters go next to another.
'working' becomes 'on' (e.g. a machine is working or on).
'p'+'on'='pon'
'weary' placed 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" .)