Crossword Genius

Small party walked up for crustaceans (8)

Ross

I believe the answer is:

decapods

'for crustaceans' is the definition.
(decapod is a kind of crustacean)

'small party walked up' is the wordplay.
'small' becomes 's' (abbreviation - e.g. clothes size).
'party' becomes 'do' (do can informally mean a party).
'walked' becomes 'paced' (pacing is a kind of walking).
'up' says the letters should be written backwards (in down clue: letters go upwards).
's'+'do'+'paced'='sdopaced'
'sdopaced' backwards is 'DECAPODS'.

I've seen this clue in The Times.
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