Crossword Genius

A river curve? (3)

Ross

I believe the answer is:

arc

I'm a little stuck... Click here to teach me more about this clue!

'a river curve?' is the definition.
'arc' can be an answer for 'curve?' (arc is a kind of curve). I'm not sure about the 'a river' bit.

'a river curve?' is the wordplay.
'river curve?' becomes 'rc' (this could be a standard abbreviation which I don't know about).
'a'+'rc'='ARC'

Can you help me to learn more?

(Other definitions for arc that I've seen before include "development of plot" , "A curve; a discharge" , "Semi-circle" , "section of Circle Line" , "bends?" .)

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