It could be forever potentially, but Cllrs are always able to review existing processes - whoever they were resolved by, and reslove to replace them. In the case of the example you quote, current Cllrs should review the CLerk's performance and ways of working annually and identify how it can be improved. The Clerk is there to serve and advise, and it seems unreasonable that he or she should be allowed to work in isolation and be empowered to fail to respond to Cllr queries. If you have a staffing committee they could review this arrangement and mak recomendations to full council.