Use of magic arts (11)
I believe the answer is:
enchantment
'use of magic arts' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for enchantment that I've seen before include "Use of magic arts - delight" , "Charm, allure" , "more powerful the further away?" , "Spell -- delight" , "Charm, delight" .)