Hi, Chris!
5a 4-letter word for climb up a tree +turn up e.g. potatoes=Gaelic wd for party
16a Double definition: cat & cash reserve
7d Def. "he rescinds";3 letters from "in full" +abb. independence Inside worst type of prisoner
21d Def. agrees (maths!); point of compass + Latin "as" + decided synonym reversed
OK?