Paramount and super eccentric, this writer (7)
I believe the answer is:
supreme
'paramount' is the definition.
(I've seen this before)
'super eccentric this writer' is the wordplay.
'eccentric' is an anagram indicator.
'this writer' becomes 'me' (the person who wrote the clues).
'super' anagrammed gives 'supre'.
'supre'+'me'='SUPREME'
'and' acts as a link.
(Other definitions for supreme that I've seen before include "Most excellent" , "topmost level" , "Highest in authority; rich cream sauce (dish)" , "Greatest in status, authority or power" , "Paramount" .)