The term 'on tap' is used to describe something that is readily available or READY to be used. The crossword solutions for this term are SLATED (6 letters), READY (5 letters), and ATTHEREADY (10 letters). SLATED means to have been arranged or planned in advance, while READY means prepared or available for immediate use. ATTHEREADY is a combination of the words 'at the' and 'READY', and it means to be prepared and waiting for something to happen.