Linger Behind is a phrase that describes the act of staying behind or delaying progress. It can be used to describe someone who is not keeping up with the group, or someone who is intentionally delaying progress. The two crossword solutions for this phrase are TRAIL and LAG, both of which refer to the idea of being behind. TRAIL is a verb meaning to follow or go after someone or something, while LAG is a verb meaning to move or progress slowly. Together, these two words accurately describe the concept of Linger Behind.