Explosive accusation? (6)
I believe the answer is:
charge
I believe this clue is a double definition.
'explosive' is the first definition.
(charge is a kind of explosive)
'accusation?' is the second definition.
(accusation is a kind of charge)
(Other definitions for charge that I've seen before include "impeachment" , "In which an offender may be given" , "Price asked; fill" , "offensive, > explosive > tax" , "person in custody" .)