From Amsterdam leave port hearing prices will gradually fall here (5,7)

I believe the answer is:

dutch auction

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

'from amsterdam leave port hearing prices will gradually fall here' is the definition.
The definition suggests a singular noun which matches the answer.

This is all the clue.

Can you help me to learn more?

(Other definitions for dutch auction that I've seen before include "for lots in Amsterdam?" , "At which prices are gradually lowered" , "Where the price bid is lowered by stages" , "progressively lower prices" .)

I've seen this clue in the Irish Times (Crosaire) and the Irish Times.

Want a hint initially instead of a full solution? Install my app