Omit to indicate spinster not at home (7)

I believe the answer is:

missout

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'home' is the definition.
I don't know anything about this answer so I can't judge whether it can be defined by this definition.

'omit to indicate spinster not' is the wordplay.
'omit' becomes 'miss' (synonyms).
'to indicate spinster not' becomes 'out' (I can't justify this - if you can you should give a lot more credence to this answer).
'miss'+'out'='MISSOUT'

'at' acts as a link.

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I've seen this clue in The Irish Independent.

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