Eccentric person, one bearing greetings? (4)
I believe the answer is:
card
I believe this clue is a triple definition!
'eccentric' is the first definition.
(I've seen this in other clues)
'person' is the second definition.
(card is a kind of person)
'one bearing greetings?' is the third definition.
(greetings card)
(Other definitions for card that I've seen before include "Jack, for one" , "Heart or club, say?" , "One taken in hand" , "Greetings ----" , "one in a suit" .)