Abduct as child gets to sleep (6)
I believe the answer is:
kidnap
'abduct' is the definition.
('kidnap' can be a synonym of 'abduct')
'child gets to sleep' is the wordplay.
'child' becomes 'kid' ('kid' can be a synonym of 'child'**).
'gets' is a charade indicator (letters next to each other).
'to sleep' becomes 'nap' (napping is a kind of sleeping).
'kid'+'nap'='KIDNAP'
'as' is the link.
(Other definitions for kidnap that I've seen before include "Small island" , "Seize, usually for ransom" , "deprive it of liberty" , "Take as hostage" , "'Abduct, snatch (6)'" .)