Possible Clues:

• Composer with chart entry devoid of skill — it's hot!
• Most music dear to the French in summer 1976, say?
• Extremely hot day
• Reptiles pushed back group of animals, 500 cut off in very hot day
• One who achieves goal installing central heating that's very hot
• Get hot in playing soccer having run on a sweltering day
• Informally a very hot day