Margate’s unlikely to become a name known to millions (8)
I believe the answer is:
megastar
'become a name known to millions' is the definition.
I don't know anything about this answer so I can't tell whether it can be defined by this definition.
'margate's unlikely' is the wordplay.
'unlikely' indicates an anagram (an unlikely spelling of the letters).
'margates' with letters rearranged gives 'MEGASTAR'.
'to' acts as a link.
Can you help me to learn more?
(Other definitions for megastar that I've seen before include "Great Sam (anag)" , "Top performer" , "Big personality" , "One v. famous" , "A-list celeb" .)