Possible Clues:

• Collect a master and principals among school staff
• Gather in great numbers for a service
• Hoard tea that's brought forward in the morning
• Put away for a rainy day
• Confession of one slow to run up?
• Build up in a heap
• Round up
• Gather it's what people may go to church at Christmas for
• Lay up
• When to ring mothers collect ...