Seems a bit of a pig this month! Two left to finish:
3down: Rugby players, a reserve, with half back, repeatedly supporting team in second half (11)
I think it could be the name of a Rugby team. A + POLO + POLO (reserve - pool - with half back twice) following (supporting) AM (second half of 'team'). This would give the answer as AMAPOLOPOLO but I cannot find this with Mr Google. (There is a place in the Philippines called Mapolopolo which has a rugby team but the initial letter 'A' is missing). Any help appreciated (with the source of the answer).
13across: As certain Cossacks kill, or blunder defending area in borders (10) I have ?A???O?I?N but no idea of what the answer could be. Any ideas please?
Many thanks