Shares responsibility to separate bachelor from kids (5,5)

I believe the answer is:

bonus issue

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'shares responsibility to separate bachelor from kids' is the definition.
I can't tell whether this definition defines the answer.

'responsibility to separate bachelor from kids' is the wordplay.
'responsibility' becomes 'onus' (onus is a duty or responsibility).
'to' is a charade indicator (letters next to each other) (I've seen this in other clues).
'separate bachelor' becomes 'b' (abbreviation e.g. BA=Bachelor of Arts. I am not sure about the 'separate' bit.).
'from' means one lot of letters go next to another.
'kids' becomes 'issue' (legal term for a person's children).
'onus' put after 'b' is 'bonus'.
'bonus'+'issue'='BONUS ISSUE'

Can you help me to learn more?

I've seen this clue in The Times.

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