Crossword Genius

About United States’ responsibility... (4)

Ross

I believe the answer is:

onus

'responsibility' is the definition.
(I've seen this before)

'about united states'' is the wordplay.
'about' becomes 'on'.
'united states'' becomes 'us' ('US' can be a synonym of 'united states').
'on'+'us'='ONUS'

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

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