Doris's daughter dressed in red cuddling sweetheart (6)
I believe the answer is:
nereid
'doris's daughter' is the definition.
The definition and answer can be both people as well as being singular nouns.
Maybe you can see a link between them that I don't see?
'dressed in red cuddling sweetheart' is the wordplay.
'dressed' is an anagram indicator ('dress' can mean 'prepare').
'cuddling' means one lot of letters goes inside another.
'sweetheart' becomes 'e' (the heart/centre of 'sweet').
'in'+'red'='inred'
'inred' is an anagram of 'nerid'.
'nerid' placed around 'e' is 'NEREID'.
Can you help me to learn more?
(Other definitions for nereid that I've seen before include "End ire (anag) - sea nymph" , "Sea nymph in greek mythology (6)" , "Sea-nymph" , "Bristle worm" , "Mythological sea nymph" .)