This is a condition having tail in a crack.
Explanation:
In the given question, the scenario is that there is a legal restriction, called as entailment, with the Cunningham family, while selling a piece of their land for the purpose of gaining money or profit. According to the legal term, entailment, the owner of the land or house is unable to sell it for profit. The property can only be transferred to the other member of the family.
So now it is a logical example that having a tail in the crack. It means that when tail of an animal is stuck in a crack, that animal is unable to move. So this example best illustrates the situation of the Cunningham Family, as they are facing the entailment, and stuck with the land which they own and which they cannot sell for profit. They do not have any other choice than staying with the land, which means their tail is stuck in the crack.
Learn more about entailment at:
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