Foxtrot: dance I sat out, spellbound (10)
I believe the answer is:
fascinated
'spellbound' is the definition.
(I know that spellbound can be written as fascinated)
'foxtrot dance i sat out' is the wordplay.
'foxtrot' becomes 'f' (phonetic alphabet: alpha, bravo, charlie etc.).
'out' is an anagram indicator (out can mean wrong or inaccurate).
'dance'+'i'+'sat'='danceisat'
'danceisat' is an anagram of 'ascinated'.
'f'+'ascinated'='FASCINATED'
(Other definitions for fascinated that I've seen before include "Irresistibly interested" , "Bewitched, enthralled" , "spellbound" , "Irresistably attracted" , "captured" .)