Possible Clues:

• Perhaps one to get inside out as 17 across may do
• Element 46; a London theatre
• One might get inside out and carry the water away
• Rain channel; (flame) start to die
• Rainwater trough
• Where snipe can be found, piping?
• Collector in the street achieving good total
• Bowling alley feature
• Water mover on a house
• Side of an alley