Having more than one place on river (6)
I believe the answer is:
plural
'having more than one' is the definition.
I can't tell whether this defines the answer.
'place on river' is the wordplay.
'place' becomes 'pl' (I've seen this in other clues).
'on' is a charade indicator (letters next to each other).
'river' becomes 'ural' (I've seen this before**).
'pl'+'ural'='PLURAL'
Can you help me to learn more?
(Other definitions for plural that I've seen before include "Consisting of more than one" , "Word form denoting more than one is involved" , "Numbering more than one" , "More than one in number" , "Composed of more than one" .)