Blast resounds with no loss of force (6)
I believe the answer is:
duress
'force' is the definition.
(duress is a kind of force)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for duress that I've seen before include "Coercion, compulsion" , "The use of force or threats to get one's way" , "Force, coercion" , "Illegal coercion" , "Constraint, force" .)