More sculpture, perhaps by European from the south (5)
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I believe the answer is:
extra
'more' is the definition.
(I've seen this in other clues)
'sculpture perhaps by european from the south' is the wordplay.
'sculpture perhaps' becomes 'art' (sculpture is a kind of art).
'by' becomes 'x' (as in 'multiplied by').
'european' becomes 'E' (abbreviation e.g. EU).
'from the south' shows that the letters should be reversed in order (in a down clue, letters go up).
'art'+'x'+'e'='artxe'
'artxe' backwards is 'EXTRA'.
(Other definitions for extra that I've seen before include "Actor in crowd scene, no lines" , "Additional expense" , "Small part actor" , "Bit-part actor" , "Wide, no-ball, leg bye, etc" .)