Brideshead Revisited author (5)
I believe the answer is:
waugh
'brideshead revisited author' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for waugh that I've seen before include "Evelyn -, twentieth century English novelist" , "to bark in > expression of anger?" , "see 26 Across" , "SECOND PART OF 19 down" , "Evelyn ..... wrote 'Brideshead Revisited'" .)