The term 'BE BEHIND' can be broken down into five crossword solutions: TRAIL (5 letters), LAG (3 letters), OWE (3 letters), ENDORSE (7 letters), and INSTIGATE (9 letters). To TRAIL someone is to follow them, usually at a distance. To LAG behind is to move more slowly than the person or group in front of you. To owe someone is to have a debt to them. To ENDORSE something is to publicly support it. Finally, to INSTIGATE something is to initiate it or cause it to happen. All of these words are related to the phrase 'be behind, ' which generally means to not keep up with someone or something.