1 ac. getting spliced is slang getting....... - people often do it in a church and the Lady enters to Mendelssohn (is that the spelling?) Well, if you do that twice, you could be committing ......
1d. is a device for introducing wind into fire. Backsmiths might use them to make their firre burn brightly. I think musical organs may use something of the same name to provide their wind.
Both these solutions begin with B.