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Those assigned to a quiet post office with trendy shirts (10)

Ross

I believe the answer is:

appointees

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'those assigned' is the definition.
I can't tell whether this defines the answer.

'a quiet post office with trendy shirts' is the wordplay.
'quiet' becomes 'p' (music symbol for 'piano', ie soft or quiet).
'post office' becomes 'po' (abbreviation).
'with' means one lot of letters go next to another.
'trendy' becomes 'in' ('in' can mean fashionable).
'shirts' becomes 'tees' (T-shirts).
'a'+'p'+'po'+'in'+'tees'='APPOINTEES'

'to' acts as a link.

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I've seen this clue in the Sydney Morning Herald.
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