In this case* the only real reason for it to crash, assuming glazed and the clock fix are for the same region and version of course, would be if the fix and the hack use the same area for something. As the fix fiddles with the actual code of the game (trying to stop the game checking for hardware that is not there and replicating the hardware as best it can) it might have used an extra section to stash its extra code in, many GBA pokemon hackers also use the extra space and it might have overlapped, pokemon hacking tools even allowing you to change locations of such things very easily compared to most other hacking work done in GBA games.
You then get to figure out if anything overlaps and possibly fix it if it does (you might also try asking the hack makers as this is not exactly a small fix that only you will benefit from).
You could also try applying the patches in a different order (in this case clock fix first, hack second and vice versa) but that seldom does much other than delay a potential crash.
*generally stacking up ROM hacks to a game is not a great plan, unless the devs actually built them to work together. This goes double if the hacks both attempt to influence the same aspect of a game. As trying is quick and free you might as well try though.
