Bizarre fast dance holding one spellbound (10)
I believe the answer is:
fascinated
'spellbound' is the definition.
('fascinate' can be a synonym of 'spellbind')
'bizarre fast dance holding one' is the wordplay.
'bizarre' indicates an anagram.
'holding' is an insertion indicator.
'one' becomes 'i' (Roman numeral).
'fast'+'dance'='fastdance'
'fastdance' is an anagram of 'fascnated'.
'fascnated' placed around 'i' is 'FASCINATED'.
(Other definitions for fascinated that I've seen before include "Bewitched, enthralled" , "Captivated" , "spellbound" , "Irresistably attracted" , "Irresistibly interested" .)