Heavy burden
'heavy burden' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for onus that I've seen before include "Liability" , "Burden, duty" , "albatross?" , "Encumbrance" , "Weight of responsibility" .)
'heavy burden' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for load that I've seen before include "Burden, onus" , "Great quantity" , "A heavy burden" , "that's put on commercial vehicle" , "Weigh down" .)