Christmas seems to have softened my brain, have had trouble with crosswords all over this weekend ..... but particularly stuck with this one ...
11a border force on bank guarding river (8) ??o???e?
23a blunder as letter writer - is taken in by male charm (8) ?i?s?e??
5d line on map is not the same motorway (8) ?s???e??
19a lacking determination as yet, in low temperature (4) ??o?