A book about husband in one's house (2,4)
I believe the answer is:
at-home
'in one's house' is the definition.
(I've seen this in another clue)
'a book about husband' is the wordplay.
'book' becomes 'tome' (a tome is a book).
'about' indicates putting letters inside.
'husband' becomes 'h' (abbreviation).
'tome' placed around 'h' is 'thome'.
'a'+'thome'='AT-HOME'
(Other definitions for at-home that I've seen before include "Where one lives" , "In (for a party?)" , "Oh mate! (anag)" , "Comfortable - in one's own country" , "Reception in one's own abode" .)