Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
What is the average number of goals with 21 games for a debut round less than 1?

### Inputs:
table_name: table, columns: ['Name', 'Club', 'Debut round', 'Games (2008)', 'Goals (2008)', 'Previous club(s)']

### Response:
SELECT AVG Goals (2008) FROM table WHERE Games (2008) = 21 AND Debut round < 1