Suffer or endure (7)
I believe the answer is:
undergo
I believe this clue is a double definition.
'suffer' is the first definition.
(I know that suffer is a more specific form of the action experience)
'endure' is the second definition.
(I know that endure is a more specific form of the action experience)
(Other definitions for undergo that I've seen before include "experience needed" , "put up with" , "Endure - urged on (anag)" , "Suffer, endure" , "Experience, be subjected to" .)