Literary work, after only half a month, upset everyone (7)
I believe the answer is:
novella
'literary work' is the definition.
(I know that novella is a type of novel)
'half a month upset everyone' is the wordplay.
'half' indicates taking half.
'a' becomes 'an'.
'month' becomes 'ove' (I've seen this in other clues).
'upset' shows that the letters should be reversed in order.
'everyone' becomes 'all' (all people).
'all' back-to-front is 'lla'.
'an' cut in half is 'n'.
'n'+'ove'+'lla'='NOVELLA'
'after only' acts as a link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for novella that I've seen before include "Small book" , "Slim work of fiction" , "Long short story?" , "short book" , "Slim volume of fiction" .)