Possible Clues:

• Follow your nose to get how fishy this is at last
• What makes the South so fishy is its 5 down
• Olfactory offender
• Offensive smell from head of sea carp
• Strong odor
• Bad smell from sulphur and fish
• Small fish producing appalling smell
• Small fish makes terrible pong
• Rotten eggs produce one
• Embrocation finally rubbed into chest — awful stink