Possible Clues:

• Dressed as a panto dame; a fierce woman
• There's a fiery bit of stuff in the river
• Mythical fire-breathing monster
• Fire from it may become such a bore, by the sound of
• Racing yacht a female impersonator may have?
• This soldier will pull round on his horse
• Reptilian monster
• Mythological creature is no grad
• Seventeen become tedious
• Pull over a particularly intimidating woman