I know that there are Treasury Credit Teams in Banks, so I would like to know what Treasury Credit is? I would also like to know the difference between Treasury Credit Risk and Credit Risk?
Treasury Credit Risk is the assessment of Credit Risk within Treasury.
Banks have a Treasury Function or a Treasury Office that (simplifying a little) oversees all of the bank's money, and watches over the bank's liquidity and capital condition.
One job they perform is the lending of surplus liquidity to other banks and the raising of funds in in the interbank market. This office also has a risk management job, which includes constantly assessing the Credit Risk of other banks that they deal with. They might decide not to do business with BANK X if they think Bank X is about to go under, for example.
Every bank is organized a little different so this answer may be a little too generic.