Trendy party with good, southern food (3,4)

I believe the answer is:

hot-dogs

'food' is the definition.
(hot dogs are a type of food)

'trendy party with good southern' is the wordplay.
'trendy' becomes 'hot' (hot can mean trendy or fashionable).
'party' becomes 'do' (do is a kind of party).
'with' means one lot of letters go next to another.
'good' becomes 'g' (abbreviation).
'southern' becomes 's' (abbreviation).
'hot'+'do'+'g'+'s'='HOT-DOGS'

I've seen this clue in The Telegraph.

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