Nitwit, a centrist struggling to impress supporter (12)
I believe the answer is:
scatterbrain
'nitwit' is the definition.
The answer and definition can be both people as well as being singular nouns.
Maybe you can see a link between them that I can't see?
'a centrist struggling to impress supporter' is the wordplay.
'struggling' indicates an anagram.
'to impress' is an insertion indicator (impress can mean enlist or recruit).
'supporter' becomes 'bra' (a bra gives support to breasts).
'a'+'centrist'='acentrist'
'acentrist' is an anagram of 'scatterin'.
'scatterin' going around 'bra' is 'SCATTERBRAIN'.
Can you help me to learn more?
(Other definitions for scatterbrain that I've seen before include "butterfly" , "Disorganised thinker" , "I'll forget" , "Dippy type" , "Person unable to think clearly" .)