The fascination of an amulet? (5)
I believe the answer is:
charm
I believe this is a double definition.
'the fascination' is the first definition.
(thesaurus)
'an amulet?' is the second definition.
('charm' can be a synonym of 'amulet')
'of' is the link.
(Other definitions for charm that I've seen before include "Talisman; flock of goldfinches" , "Enchant" , "Attractive manner" , "Power of fascination" , "Delight; magical object" .)