The term 'DIG DEEP' can be broken down into three crossword solutions: DELVE (5 letters), PROBE (5 letters), and MINE (4 letters). DELVE means to search deeply and thoroughly, while PROBE implies to investigate or examine something closely. Lastly, MINE is an act of extracting resources from the ground. All three words suggest that one should take the time to look into something in order to gain a better understanding.