Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_68 (goals_for INTEGER, wins VARCHAR, goal_difference VARCHAR, club VARCHAR)

### Question ###
What was the average number of "goals for", scored in the club Real Oviedo that had a "goal difference" lower than -16 and fewer than 9 wins?

### Accurate SQL ###

SELECT AVG(goals_for) FROM table_name_68 WHERE goal_difference < -16 AND club = "real oviedo" AND wins < 9