Possible Clues:

• Was there something a little fishy about, that is to say, Burns?
• Tempestuous
• That is to say in what's a little fishy by way of 15 across
• Choleric
• Easily angered
• It's a little fishy, around that is to say from Burns
• It's hot, that is to say, in what's a little fishy
• Torridly hot
• 'Flaming little fish around, that is to say (5)'
• Like a burning temper?