Hi all,
8 down, place names derived from the names of real or mythical people, (7) e?o?y?s.
18 down, relating to origin, (7) ????t?c.,
17 down, a professional who designs, eg.public works, ((8) ?????e?r.
18 across, aphids,plant lice,(10) ??e???l?e?..
22 across, catching with a rope that has a running-knot (7) ??o???g.