I draw out a piece of tag sized parchment paper, inscribing the Kanji for 'explosion' onto it. I then infuse my chakra into the Kanji, before slapping it on the ground and retreating. As your clone nears the tag would react to its chakra, and, in turn would explode.
Personally, I think this is a pretty situational technique. It's only merit is the fact that it both reacts to chakra, making it an automatic technique without the requirement for recognition, and that it's an actual technique, forcing the opponent to counter. I guess you could apply it to something that moves, like a Kunai, or a solid technique, but then it wouldn't really be fulfilling any role that a standard explosive tag couldn't, other than the whole auto explode thing, and I guess your opponent might have to evade with an actual technique, depending on its usage.
However, it could essentially be used effectively against Minato bios. And if done so properly could essentially wreck them, especially if you have a S/T technique yourself. Placing a tag and drawing in a Minato bio towards you could spell a certain win, provided you can get away from the tag without dying yourself, aswell as making sure that no metagaming ensues in attempts to escape.
Can't really think of anything special to combo it with, other than slapping it onto a solid, or perhaps even liquid technique, maybe something ignitable.