Experience (something bad) (6)
I believe the answer is:
suffer
'experience something bad' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for suffer that I've seen before include "Be affected by (illness)" , "Undergo, endure" , "Undergo pain or privation" , "Experience (something bad)" , "Endure pain or discomfort" .)