The dialect word clunter is either a big lump or a clattering noise. I can picture Cluntergate being a muddy thoroughfare up the slope into Horbury with logs laid down along the boggier parts. Any cart approaching this way would clatter as it negotiated the logs.
This little Jack Russel terrier was tethered outside a shoe shop on Horbury High Street. It gave such a friendly greeting to each passer by that I wondered if one of them was going to prove to be its owner, but as we went off to our next port of call it was still there, patiently waiting.