Who is the opponent in the final with a clay surface at the Tournament of Lyneham?
CREATE TABLE "singles_titles" (
  "date" text,
  "tournament" text,
  "surface" text,
  "opponent_in_the_final" text,
  "score" text
);
SELECT "opponent_in_the_final" FROM "singles_titles" WHERE "surface"='clay' AND "tournament"='lyneham';