What could be seen as our responsibility? (4)
I believe the answer is:
onus
'responsibility?' is the definition.
(I've seen this before)
I don't understand the remainder of the clue.
(Other definitions for onus that I've seen before include "Liability" , "Weight of responsibility" , "Encumbrance" , "'Responsibility, task or burden (4)'" , "Responsibilty" .)