Record book hidden in a chimney (5)
I believe the answer is:
album
'record' is the definition.
(I've seen this before)
'book hidden in a chimney' is the wordplay.
'book' becomes 'b'.
'hidden in' is an insertion indicator.
'chimney' becomes 'lum' (I've seen this in other clues).
'a'+'lum'='alum'
'b' going within 'alum' is 'ALBUM'.
(Other definitions for album that I've seen before include "Book for stamps/photos" , "Compilation of recordings" , "Blank book for keeping stamps, photographs etc" , "series of tracks" , "Old LP - book of photos" .)