Radial 4 is : characi(n). An alternative to characid.
It's quite possible that a number of solvers will find solving the last few clues to be a bit of a chore. There is a facebook account for Johannes DeSilentio from Copenhagen which has the complete solution.
Hi Orson.
Radial 3 is inward, starting non-perimeter. Expenditure is cost, extra letters are E.
Radials 7-12 : 7 Inward, non-perimeter (starting 3rd ring, as in bye-bye), 11 outward, and the rest are inward starting in the perimeter.