Writer's whereabouts unsettled with book's release (10)
I believe the answer is:
waterhouse
'writer's whereabouts unsettled with book's' is the definition.
I can't judge whether this definition defines the answer.
'release' is the wordplay.
I cannot really understand how this works, but
'release' could be 'water' (watering is a kind of releasing) and 'water' is found within the answer.
The remaining letters 'house' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for waterhouse that I've seen before include "He was often satirical" , "British artist" , "he was a Pre-Raphaelite" .)