Good morning, mjk.
I can provide help with 2 out of 3.
For 2 down, your last letter is wrong, so it's not "sail"! Start with a synonym for "meek souls" (young animals led to slaughter), take away "b" for "bishop", and you have a synonym for "attacks".
For 12ac., take a 3-letter synonym for "blue" (feeling), take off its tail, and add a 4-letter synonym for "carp/complain". Result - a native of an island in Polynesia.
As for 1d., at the moment I have .a.(a?)=.a.a.
Hoping this helps!
Al Issner