The crossword solution for the term 'give one's approval to' is 'ENDORSE'. Endorsement is a form of approval, usually given by a person or organization to another person or organization. It is often used in the context of business, politics, and sports, where an endorsement can be seen as a sign of support or approval. Endorsement can also refer to the act of signing a document, such as a check or contract, to signify agreement with its contents.