Burden that's our responsibility (4)

direction: down
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Source: Times Quick Cryptic 1420 https://times-xwd-times.livejournal.com/2191817.html

See replies for a hint, the answer, and an explanation

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O_U_

[this post gives you every second letter of the answer to help you solve the clue]

ONUS

[this post gives you the answer without any explanation to help you interpret the clue by yourself]

ONUS

Explanation:

ON•US

Double definition/whimsical clue

Burden = ONUS
Our responsibility = ON US

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