I recently re-joined an online forum that I was part of many years ago called the Muse’s Muse. It’s populated mostly by lyricists, and there’s ample opportunity for musicians to collaborate with lyricists to complete songs. There are also threads for posting your works in progress for peer review, and showcasing your finished songs. I even had my album reviewed on the site!
Someone started a thread called the “Short Song Challenge” and several members posted lyric ideas for a short song (under 2 mins) that contained at least a verse, chorus, maybe a bridge. I took a lyric written by Mike B., and decided to put some music and vocals to it. My first take was far too bright and happy for the rather dark lyrics, so I tried a more industrial approach with heavier drums and distorted guitar. I got his lyric into a 54 second song with a musical intro and interlude, too. I took a cue from my friend Phil and wrote the bassline first.