### Clue: Spooner's happy smiling at wedding, maybe (8)
### Answer: CEREMONY 
 ### Explanation: Definition: wedding, maybe
 Spoonerism of "merry"(happy) "sunny"(smiling;beaming).  I'm not sure of the second part of the answer:  I'm under the impression that it's pronounced "…m-oh-ny" or even "…m-uh-ny", but not "…m-ah-ny".
Answer: Of which a wedding is an example;maybe.