Printed picture of the river? (5)
I believe the answer is:
plate
'printed picture' is the definition.
'plate' can be an answer for 'picture' (thesaurus). I'm not sure about the 'printed' bit.
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for plate that I've seen before include "Thin sheet, as of glass" , "horseshoe" , "Flat dish; gold and silver ware" , "Flat dish for food" , "From which food is eaten or served" .)