Number one fan is to get bashed (7)
I believe the answer is:
egotist
'number one fan' is the definition.
The answer and definition can be both people as well as being singular nouns.
Perhaps there's a link between them I don't understand?
'is to get bashed' is the wordplay.
'bashed' indicates anagramming the letters.
'is'+'to'+'get'='istoget'
'istoget' is an anagram of 'EGOTIST'.
Can you help me to learn more?
(Other definitions for egotist that I've seen before include "Bighead" , "A self-absorbed and conceited person" , "Person with inflated self-image" , "Self-interested person" , "Self-obsessed individual" .)