Crossword Genius

Using broad terms at home with unacceptable sentence (2,7)

Ross

I believe the answer is:

in outline

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'using broad terms at home' is the definition.
I know nothing about this answer so I cannot judge whether this works.

'with unacceptable sentence' is the wordplay.
'with' means one lot of letters goes inside another.
'unacceptable' becomes 'out' (out can mean incorrect or inappropriate).
'sentence' becomes 'inline' (I am not sure about this - if you are sure you should believe this answer much more).
'out' put into 'inline' is 'IN OUTLINE'.

Can you help me to learn more?

I've seen this clue in The Daily Express.
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