Daughter turned up recording a book — here’s a sample? (4,4)

'a sample?' is the definition.
(eg sample of a musician's work)

'daughter turned up recording a book' is the wordplay.
'daughter' becomes 'd' (genealogical abbreviation).
'turned up' is a reversal indicator.
'recording' becomes 'EP' (extended play vinyl record).
'book' becomes 'tome' (a tome is a book).
'ep'+'a'+'tome'='epatome'
'epatome' reversed gives 'emotape'.
'd'+'emotape'='DEMO TAPE'

'here's' acts as a link.