Second half of writer’s catalogue (4)
I believe the answer is:
list
'catalogue' is the definition.
(a catalogue is a list of items)
'second half of writer's' is the wordplay.
'second half of' indicates taking half (the back or second half of the word).
'writer' becomes 'novelist' (novelist is a kind of writer).
'novelist' halved is 'LIST'.
(Other definitions for list that I've seen before include "Tabulate" , "choice" , "Fillet" , "Desire" , "Series of entries" .)