Witch captured by Venus or Ceres somehow (9)
I believe the answer is:
sorceress
'witch' is the definition.
(I've seen this before)
'captured by venus or ceres somehow' is the wordplay.
'captured by' says the answer is hidden in the clue.
'SORCERESS' is hidden within 'venus or ceres somehow'.
(Other definitions for sorceress that I've seen before include "Circe, perhaps" , "Enchanting female" , "She spells" , "Spell-casting female" , "one who has magic powers" .)