Possible Clues:

• See 15
• — Hills, to north-west of London
• Hundreds of parliamentary hills in England
• With which hundreds find a way out of politics
• The hills will make the bird cold, by the sound of it
• '... a book filling these meadows and the mill precincts with -- romance' (D. H. Lawrence, The White Peacock)
• - - Hundreds, a district of Buckinghamshire
• - Hundreds provide resignation route for MP
• 'Job' for retiring MPs
• - - Hundreds