Table schema:
CREATE TABLE table_name_53 (goals_for INTEGER, goal_difference VARCHAR, goals_against VARCHAR, club VARCHAR)

Question: What is teh average amount of goals for club real avilés cf, which has more than 59 goals against and a -10 goal difference?
SQL: SELECT AVG(goals_for) FROM table_name_53 WHERE goals_against > 59 AND club = "real avilés cf" AND goal_difference > -10