7d: Train ran once a month originally for remote Irish destination (9). If our across answers are right, we have C*N*S*A*A. The only remotely possible word shows up as CONESTOGA - an old horse-drawn wagon...train? We're lost here.
57 ac: For trial, took up with Left: set to agitate (4-4). I have *E*T (hyphen) *L*W.
Many thanks.