Just got the "Sea Dew" too... i'm in stitches.
I've got the "Ride On" MacCarthy's book at home, very interesting kind of Autobiography through his songs, very similar in the idea to the unique "One Voice" by Christy. I will copy what he says about the song tonight for you guys. From what i remember, it's about parting love and there is a bit about the "claw" thing too. Hang on... SeaDew...