It is called SetClockNTP and delivered with MorphOS. If it really looses a few minutes per hour, then you should launch a script which looks like this:
Lab loop
SetClockNTP
Wait 60 mins
Skip loop BACK
This will update the clock every 60 minutes.
To launch the script automatically just create a file in S: named "network-startup" with the following lines:
execute MOSSYS:s/network-startup
execute s:FixClock.script
Of course the FixClock.script file is the one you created above and you must ensure to just create/edit the network-startup in SYS:S.
Geit