Last two:
5d Latin stranger is more cunning (7). L-E-I--
13a Rubber endlessly must erase slips (7). M-S-E--
Probably very obvious, but I just can't see them.
Any help gratefully received.
Thank you Biblebub. Looked at dropping the wrong letters in the anagram for 13a and hadn't spotted the "archaic" definition in 5d. Can go and concentrate on with other stuff now.