Writer not ultimately adopted by Andersen? (5)
I believe the answer is:
dante
'writer' is the definition.
(Dante is an example)
'not ultimately adopted by andersen?' is the wordplay.
'ultimately' indicates one should take the final letters.
'adopted by' means one lot of letters goes inside another (I've seen this in other clues).
'andersen?' becomes 'dane' (eg Hans Christian Andersen, Danish author).
The final letter of 'not' is 't'.
't' inserted inside 'dane' is 'DANTE'.
(Other definitions for dante that I've seen before include "Great Italian poet of 'The Divine Comedy'" , "Net Da a poet" , "Thirteenth-fourteenth century Italian poet" , "Inferno poet" , "La divina commedia poet" .)