All agendas and minutes for every parish council committee must be published without exception. The issue with Personnel Committee minutes is that this legal requirement clashes with the Data Protection Act. Therefore the minutes must state the items under discussion and the decision but must be edited so that the DPA is not affected i.e, "it was RESOLVED that the Parish Clerk receive an increase in the salary by 1 spinal point to reflect the CiLCA qualification" - this would show that the clerk received an increase but would not breach the Data Protection Act by stating how much exactly the Clerk was paid.
With regards to the exact salary of the Clerk, the main reason for having a personnel committee is to act with delegated authority on items such as salary levels on behalf of the parish council. No other councillors have the right to know what the Clerk is paid as they have passed the authority to act to the committee. However, it is not unreasonable to ask and see a redacted copy of their contract so that you are aware of the terms of their employment in regards to holiday, sickness, maternity entitlement etc. Most Clerks are employed under the SLCC model contract terms anyway....
The only other way for you to know how much the Clerk is paid is to join the personnel committee....