/diy/ - Do It Yourself

that's a funny pile of crap. if it was backed up and clogged you could simply verify that by backing up the sink or checking to see if it starts leaking immediately. I wouldn't waste time on considering a clog unless you can at least get the sink backed up
plenty of fittings will leak from regular flow if the glue fails and that glue doesn't look right at all
if the leak is coming from the top of that t (which does not look like the appropriate sant lmao)
I personally would cut above the hub, and remove the 90 after disconnecting whatever drain is running into it. use a rambit to clear the t hub and just replumb a 90 and stubout to that sink drain
the only thing easier than that would be jb weld or abs glue that joint and pray