The term 'WHAT HATH GOD WROUGHT SENDER' is a reference to the first telegraph message sent by Samuel MORSE in 1844. The crossword solution for this term is MORSE, which is a five-letter word. MORSE was an American inventor who developed the telegraph system and MORSE code, which is a system of dots and dashes used to represent letters and numbers. His invention revolutionized communication and allowed messages to be sent over long distances quickly and efficiently.