One who enters the mosque while the imam is praying 'Asr and he has not yet prayed Zuhr

Q: If a person has a missed prayer, such as Zuhr for example, and he remembers it after the call to prayer for 'Asr has been made, does he join the congregation with the intention of 'Asr or with the intention of Zuhr? Or does he pray Zuhr alone first and then pray 'Asr? And what is the meaning of the jurists' statement: "If he fears missing the current prayer, the order is dropped"? Does the fear of missing the congregation drop the order?

A: It is prescribed for the person mentioned in the question to pray Zuhr with the congregation present, with the intention of Zuhr, and then to pray 'Asr afterwards, because maintaining the order is obligatory, and the fear of missing the congregation does not drop the order.
As for the statement of the jurists (may Allah have mercy on them): "If he fears the time of the current prayer will end, the order is dropped," its meaning is: that it is obligatory for one who has a missed prayer to start with it before the current prayer. If the time for the current prayer becomes narrow, he starts with the current prayer. An example of this is if he has the 'Isha' prayer and does not remember it until near the sunrise, and he has not prayed Fajr that day, then he starts with the Fajr prayer before its time ends, because the time has become specific for it, and then he prays the missed prayer.