To die from contents of hamper is horrendous (6)
I believe the answer is:
perish
'to die' is the definition.
('perish' can be a synonym of 'die')
'contents of hamper is horrendous' is the wordplay.
'contents of' indicates a hidden word.
'PERISH' is hidden in the letters of 'hamper is horrendous'.
'from' is the link.
(Other definitions for perish that I've seen before include "Die; decay" , "Waste away" , "Pass away" , "Deteriorate, rot" , "Lose one's life" .)