Go over undulating track (6)

I believe the answer is:

groove

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

'track' is the definition.
(thesaurus)

'go over undulating' is the wordplay.
'go over' anagrams to 'GROOVE'.
Though, I am not clear how this is indicated.

Can you help me to learn more?

(Other definitions for groove that I've seen before include "Spiral track followed by a gramophone needle" , "Long thin channel in surface of hard material" , "Long narrow furrow" , "feature on an old disc" , "Established routine" .)

I've seen this clue in The Guardian and The Globe and Mail.

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