Something from river put in ring? (5)
I believe the answer is:
pearl
'something from' is the definition.
I can't tell whether this defines the answer.
'river put in ring?' is the wordplay.
'river' becomes 'r'.
'put in' is an insertion indicator.
'ring?' becomes 'peal' (pealing is a kind of ringing**).
'r' going within 'peal' is 'PEARL'.
Can you help me to learn more?
(Other definitions for pearl that I've seen before include "Gem from oyster" , "Precious jewel from the oyster" , "greatly valued" , "White - jewel" , "Oyster growth" .)