She helped Jason to fleece her dad (5)
I believe the answer is:
medea
'she helped jason' is the definition.
(I've seen this in another clue)
'fleece her dad' is the wordplay.
I cannot really see how this works, but
'her' could be 'ede' and 'ede' is located in the answer.
The remaining letters 'ma' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
'to' is the link.
Can you help me to learn more?
(Other definitions for medea that I've seen before include "Greek sorceress" , "Jason's sorceress" , "Mrs Jason" , "Mythological Greek princess" , "Jason's wife who murdered their children" .)