1d second def fits the home I grew up in. Happy days...
I enjoyed this Spoonerism. I feel that the idea of a spoonerism is more to do with swapping phonemes than letters, and that fits this one perfectly.
I questioned 'rot' in 13d too. Gunpowder took a moment to connect.
Strictly 15a's more a baritone than a tenor now, but historically I suppose it's OK. I thought 'jokes' in 14 was a bit iffy too, but it's all fair really.