Related Clues:
- Go slow, entering sunbeam -- this doesn't happen often
- Fish circling river -- it's not a common thing
- Tub removed from tributary - it's a collector's item
- Once-in-a-blue-moon occurrence
- A slowing down in network is no common occurrence?
- Deity repeatedly upset another — that's very unusual
- Factor in a trading card's price
- Scarce item
- Track going round a river -- it's something unusual
- Curiosity of artist right before thing with unknown
- Wonder when 2, all but its first and second failing
- Kind of skirt is donned by a very unusual type
- Triple play, for one