Crossword Genius

Where to find alternating current (5,5)

Ross

I believe the answer is:

tidal river

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

'where to' is the definition.
Although both the answer and definition are singular nouns, I can't understand how one could define the other.

'alternating current' is the wordplay.
'alternating' becomes 'tidal' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'current' becomes 'river' (I've seen this before).
'tidal'+'river'='TIDAL RIVER'

'find' is the link.

Can you help me to learn more?

(Another definition for tidal river that I've seen is " It rises and falls".)

I've seen this clue in The Guardian and The Globe and Mail.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.