Danger: high energy explosive (7)
I believe the answer is:
grenade
'explosive' is the definition.
(I know that grenade is a type of bomb)
'danger high energy' is the wordplay.
'high' indicates an anagram (can mean drunk or on drugs and hence disordered).
'energy' becomes 'e' (physics symbol as in E=mc2).
'danger' anagrammed gives 'grenad'.
'grenad'+'e'='GRENADE'
(Other definitions for grenade that I've seen before include "Hand-thrown explosive" , "Enraged (anag)" , "Handy bomb" , "Missile thrown" , "Pineapple" .)