Hello!
Typically a cluster feed is late afternoon early evening, feeding every 1.5 to 2 hours. So it would go something like this...
If he is on a 3 hour routine:
Feeds at:
7:00
10:00
1:00
4:00
6:00 (clusterfeed)
8:00 (clusterfeed)
BEDTIME
You may then choose to do a dreamfeed between 10-11:00PM
For the clusterfeeds, offer as much as he'll take (it may just be a couple of ounces which is ok, it's just to tank him up)