Burden on you and me (4)

I believe the answer is:

onus

'burden' is the definition.
('onus' can be a synonym of 'burden')

'on you and me' is the wordplay.
'you and me' becomes 'us'.
'on'+'us'='ONUS'

(Other definitions for onus that I've seen before include "Burden, duty" , "Liability" , "Encumbrance" , "'Burden, load (4)'" , "'Responsibility, task or burden (4)'" .)

I've seen this clue in The Times.

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