Bumped into as one went out (6)
I believe the answer is:
'bumped' is the definition.
The definition and answer can be both to do with contact as well as being past participle verbs.
Maybe there's an association between them I don't understand?
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for struck that I've seen before include "hit hard", "stopped working", "Collided", "Female relative", "dismantled".)