How to clear a particular partition?

[Sven Ludwig]

Hello,
 
assume that all producers and consumers regarding a topic-partition have been 
shutdown.
 
Is it possible in this situation to empty that topic-partition, while the other 
topic-partitions keep working?
 
Like for example, is it possible to trigger a log truncation to 0 on the leader 
for that partition using some admin tool?
 
Kind Regards,
Sven