Final answer:
The word "clok" is misspelled according to the "-ck" rule because it is a long vowel.
Step-by-step explanation:
The word "clok" is misspelt according to the "-ck" rule because it is a long vowel. In English, when a word has a long vowel sound before the sound /k/, it is spelled with a "ck". For example, the word "clock" has a long vowel sound before the /k/ sound, so it is spelled with "ck". However, in the case of "clok", it does not have a long vowel sound before the /k/ sound, so it should be spelled with just a "k".
Learn more about Spelling rule for long vowel sounds before /k/