Disney's mermaid (5)
I believe the answer is:
ariel
'disney's mermaid' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for ariel that I've seen before include "spirit of Shakespeare" , "Sycorax victim (Tempest)" , "Moon" , "Shakespearean role" , "Moulding round top of wall" .)