Post for wishing well? (9,4)
I believe the answer is:
greetings card
I'm afraid I can't explain this answer.
Can you help me to learn more?
(Other definitions for greetings card that I've seen before include "Means of salutation" , "It's used for wishing well" , "way to convey birthday wishes?" , "Valentine, for instance" , "item of Christmas post?" .)