Load borne by you and me (4)
I believe the answer is:
onus
'load' is the definition.
('onus' can be a synonym of 'load')
'borne by you and me' is the wordplay.
'borne by' becomes 'on' (I've seen this in other clues).
'you and me' becomes 'us'.
'on'+'us'='ONUS'
(Other definitions for onus that I've seen before include "Responsibilty" , "'Responsibility, task or burden (4)'" , "Encumbrance" , "Duty or responsibility" , "Obligation - charge" .)