The crossword solution FOR the term 'I'm Sorry, FOR ONE' is an APOLOGY, which has seven letters. An APOLOGY is a statement expressing regret or asking forgiveness FOR a mistake or offense. It is often used to make amends FOR a wrong that has been committed. Apologies can be made in person, over the phone, or in writing. Apologies are often seen as a sign of humility and respect, and can help to restore relationships that have been damaged by a mistake or offense.