Fail (7)
(Other definitions for undergo that I've seen before include "having to travel by tube" , "Endure or be subjected to" , "Endure - urged on (anag)" , "Suffer reverse" , "Submit to an experience" .)
'fail' is the definition.
(I know that fail is a is a kind of of founder)
This is all the clue.
(Other definitions for founder that I've seen before include "Sink, come to grief" , "collapse" , "One sets up firm" , "Creator" , "One who establishes an institution" .)
(Other definitions for epic that I've seen before include "Long narrative poem telling of a hero's deeds" , "Larger than life" , "Long, heroic story" , "Long poem telling of great events" , "Marathon" .)
'fail' is the definition.
(I know that fail can be written as bomb)
This is the entire clue.
(Other definitions for bomb that I've seen before include "Explosive device" , "Exploding device" , "worn-out car" , "charge" , "Flop - load of money" .)
(Other definitions for godown that I've seen before include "eastern warehouse" , "storage facility in India" , "Leave university" .)