Eccentric queen, for example (4)
I believe the answer is:
card
This clue is a double definition.
'eccentric' is the first definition.
(I've seen this before)
'queen for example' is the second definition.
(queen is a kind of card)
(Other definitions for card that I've seen before include "Bit of a wag - joker, perhaps" , "club, for example" , "witty type" , "showing heart, say" , "Something players try to avoid" .)