You may well be familiar with the concept of matter and antimatter. Or you may not. If you are, you don’t need me to explain it again. If you aren’t, I suggest that you consult Wikipedia or Dr Who, which is where most of my scientific knowledge comes from.
All I know is that when the two meet, the consequences are not good.
Clutter and anticlutter are slightly different. When the two meet there is no mystery of quantum physics or annihilation. There is merely a sigh, an old-fashioned look and a patient explanation.
You see, clutter is the undesirable accumulation of a husband. Anticlutter is the vital stock of craft supplies belonging to his wife. Things like paper straws, cardboard oddments and the fleeces of Jacobs sheep are essentials. Ordnance Survey maps from the 1950s, military cap badges and comic postcards are mere detritus.
When the two meet anticlutter survives, or even expands: only the clutter is annihilated. And possibly the husband, if he objects.
That, at least, is how Julia explains it.