The term RESPONSIVE (TO) can be broken down into three crossword solutions: ATTUNED (7 letters), FOR (3 letters), and INANSWER (8 letters). ATTUNED means to be in harmony or agreement with something, while FOR indicates a direction or purpose. INANSWER is an archaic term meaning in response to. Taken together, these three words describe the concept of being responsive to something, which means to react quickly and positively to a situation or stimulus.