There were several people asking about this just recently. I had a chance to test the clearing time of TMY-2 in 120 format. With Ilford Rapid fix diluted to 1+4, it took 1 minute and 15 seconds to clear completely. This was a fixer that has processed 5 films so far. So using double the time of it takes to clear math, it'd be 2 minute and 30 seconds. I usually fix for 6 minutes however.