Crossword Genius

Fresh water, but it's said to have a smell (4)

Ross

I believe the answer is:

oder

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

'fresh water' is the definition.
'Oder' can be an answer for 'water' (Oder is an example). I am not certain of the 'fresh' bit.

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for oder that I've seen before include "waterway" , "German banker" , "East European river" , "River flowing into the Baltic" , "River on border of Poland and Germany" .)

I've seen this clue in the Evening Standard.
Want a hint initially instead of a full solution? Install my app