Crossword Genius

Burden — and where it might fall (4)

Ross

I believe the answer is:

onus

I'm a little stuck... Click here to teach me more about this clue!

'burden' is the definition.
(I know that burden can be written as onus)

'and where it might fall' is the wordplay.
I cannot really see how this works, but
'and' could be 'n' (common abbreviation for 'and') and 'n' is found within the answer.
The remaining letters 'ous' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for onus that I've seen before include "albatross?" , "'Responsibility, task or burden (4)'" , "Encumbrance" , "'Burden, load (4)'" , "Weight of responsibility" .)

I've seen this clue in The Times.
Want a hint initially instead of a full solution? Install my app