Type of book (5)
'type of book' is the definition.
This is the entire clue.
(Other definitions for hardback that I've seen before include "Book with board covers" , "Sort of book" , "Penguins are rarely so" , "It might be a novel!" , "Book with stiff covers" .)
'type of book' is the definition.
This is all the clue.
(Other definitions for novel that I've seen before include "book such as Brave New World" , "Fictional work" , "New and intriguing" , "Of a kind not seen before" , "Innovative" .)