Crossword Genius

Streamlined mound formed by glacial action (7)

Ross

I believe the answer is:

drumlin

(Other definitions for drumlin that I've seen before include "Small glacier-formed hill" , "Small elongated oval hill, in Cavan, say" , "Hummock of boulder clay left by a retreating glacier" , "'Small ridge, common in Cavan and Monaghan (7)'" , "oval mound" .)

I've seen this clue in The Times.
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