Eccentric performance by Queen follows daily (9)
I believe the answer is:
character
'eccentric' is the definition.
('character' can be a synonym of 'eccentric')
'performance by queen follows daily' is the wordplay.
'performance' becomes 'act' (act is a kind of performance**).
'by' is a charade indicator (letters next to each other).
'queen' becomes 'er' (abbreviation for Elizabeth Regina).
'follows' says to put letters next to each other.
'daily' becomes 'char' (I've seen this before).
'act' put next to 'er' is 'acter'.
'acter' after 'char' is 'CHARACTER'.
(Other definitions for character that I've seen before include "Role - nature" , "Person in a novel or play" , "Stamp < letter" , "Nature; good reputation" , "Quality" .)