Clue: Shell supports her in painting atrophied bananas (9)
Answer: APHRODITE
Explanation: Definition: Shell supports her in painting
***(atrophied)** [anag:*bananas*] 
*The famous Botticelli painting in which the goddess Venus appears standing nude in a scallop shell is called *The Birth of Venus*, but Venus and Aphrodite are the Roman and Greek names for the same goddess, so I suppose this is OK.