Songbook Hamlyn adapted (6)
I believe the answer is:
hymnal
'songbook' is the definition.
(hymnal is a kind of songbook)
'hamlyn adapted' is the wordplay.
'adapted' indicates anagramming the letters.
'hamlyn' anagrammed gives 'HYMNAL'.
(Other definitions for hymnal that I've seen before include "Book of religious songs" , "Book of church music" , "Book used in church" , "Hymnbook" , "Book containing songs of praise" .)