Charm of fantastic A-list fellow (8)
I believe the answer is:
talisman
'charm' is the definition.
(I've seen this before)
'fantastic a-list fellow' is the wordplay.
'fantastic' is an anagram indicator.
'fellow' becomes 'man' (I've seen this before**).
'a'+'list'='alist'
'alist' with letters rearranged gives 'talis'.
'talis'+'man'='TALISMAN'
'of' acts as a link.
(Other definitions for talisman that I've seen before include "bringer of luck?" , "Object thought to guard against evil" , "Magically protective object" , "which is charming" , "Protective charm" .)