Spellbind (7)
(Other definitions for enthral that I've seen before include "yoke" , "give a spell-binding performance" , "Hold spellbound" , "be captivating?" , "rivet" .)
'spellbind' is the definition.
(I know that spellbind can be written as bewitch)
This is the entire clue.
(Other definitions for bewitch that I've seen before include "Entrance" , "Enchant - or curse" , "intrigue" , "Fascinate - charm" , "Captivate" .)