Possible Clues:

• Smoker on the roof?
• My niche could be a sooty sort of place
• Sound of a bell ringing new year: it's often on a rooftop
• *Passageway for Santa (letters 4-6)
• Smoke pipe
• Sweep's milieu
• It's Sooty and Sweep's workplace?
• & 1 Down Nooky place where Connie and Cherry flirt with me endlessly
• Pot smoker?
• One's stacked sound boxes neatly at first on back of lorry