More than one penny left in Russian river? (6)
I believe the answer is:
plural
'more than' is the definition.
(I've seen this before)
'one penny left in russian river?' is the wordplay.
'one penny left in' becomes 'pl' (I can't justify this - if you can you should give a lot more credence to this answer).
'russian river?' becomes 'ural' (I've seen this in other clues).
'pl'+'ural'='PLURAL'
Can you help me to learn more?
(Other definitions for plural that I've seen before include "Word ending in 'L' for words ending in 'S'?" , "Form of noun or verb in respect of more than one" , "Consisting of more than one" , "Numbering more than one" , "Word usually ending in 's'" .)