DeGeneres the voice of her party line (4)
I believe the answer is:
dory
'degeneres the voice of her' is the definition.
I can't tell whether this defines the answer.
'party line' is the wordplay.
'party' becomes 'do' (do can informally mean a party).
'line' becomes 'ry' (abbreviation for railway).
'do'+'ry'='DORY'
Can you help me to learn more?
(Other definitions for dory that I've seen before include "Sea-wolf" , "another fish wanted" , "Fish of mackerel family" , "Marine fish; rhymes with fable" , "Fish and flat-bottomed boat" .)