Quiet party ushered inside notice seaport (6)

I believe the answer is:

ashdod

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'notice seaport' is the definition.
I know nothing about this answer so I can't judge whether it can be defined by this definition.

'quiet party ushered inside' is the wordplay.
'quiet' becomes 'sh' (both can be said to tell someone to be quiet).
'party' becomes 'do' (do can informally mean a party).
'ushered' becomes 'ad' (I can't justify this - if you can you should give a lot more credence to this answer).
'inside' means one lot of letters goes inside another.
'sh'+'do'='shdo'
'shdo' placed into 'ad' is 'ASHDOD'.

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I've seen this clue in The Times.

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