Possible Clues:

• It will turn round, starting to flag
• I get sick of getting you on the phone after tea
• It will wear one out so to use the phone after tea
• After very little time, I found Wagner cycle wearisome
• I phone you after tea, though it's a bore
• Exhausting individual in town in Hertfordshire
• It may exhaust me if I get on the phone after tea
• It turns so wearing to press the bell at last
• Is it up to getting around to be wearing out?
• Burdensome