The words below are missing something that is hinted at by the last clue. What is it?

1. TEN _____

2. SUN _____

3. SOFT _____

4. BLIND _____

5. SWEET _____

6. Cleaning product 

Answer:

 

The words are missing SPOT, which could follow each of them - as hinted at by the clue "Cleaning product" - SPOT REMOVER.

 

Credit:
Michael Schlossberg