### Clue: Adolf's companion volume, carried by each supporter, in need of substantial organisation (3,5)
### Answer: EVA BRAUN 
 ### Explanation: Definition: Adolf's companion
 V(symbol for "volume", in physics, say) **contained in**(carried by) EA(abbrev. for "each") + BRA(a supporter of the feminine chest) **plus**(in need of) UN(abbrev. for the United Nations, the large;substantial organisation).
Defn: Adolf Hitler's, that is.