Zi Collection, Upper Volume, Page 13, Entry 08
Radical: Clothing (yī)
Pronounced xūn (rising tone) - "Tang Yun" pronunciation.
Pronounced xūn (rising tone) - "Ji Yun" pronunciation.
Same pronunciation as "xun".
"Shuowen Jiezi" explains it as the top of a collar.
Also, "Ji Yun" pronunciation is sūn (rising tone), same pronunciation as "xun". The meaning is the same.