Taken away, goat was asleep (9)
I believe the answer is:
kidnapped
'taken away' is the definition.
'goat was asleep' is the wordplay.
'goat' becomes 'kid' (kid is a kind of goat).
'was asleep' becomes 'napped'.
'kid'+'napped'='KIDNAPPED'
(Other definitions for kidnapped that I've seen before include "novel for a boy" , "Abducted" , "Classic novel" , "Book by Stevenson" , "Taken prisoner for ransom - R. L. Stevenson novel" .)