Do the done thing with WWI novel (4,4,3,4)
I believe the answer is:
gone with the wind
'novel' is the definition.
(I've seen this before)
'do the done thing with wwi' is the wordplay.
'do' indicates an anagram (solvers must work out or 'do' the anagram puzzle).
'with' is a charade indicator (letters next to each other).
'the'+'done'+'thing'='thedonething'
'thedonething' after 'wwi' is 'wwithedonething'.
'wwithedonething' anagrammed gives 'GONE WITH THE WIND'.
(Other definitions for gone with the wind that I've seen before include "Novel" , "left where orchestral oboists sit" , "Scarlett O'Hara book" , "picture" , "Book to read or film to see" .)