Crossword Genius

Get on top of a series — it's going downhill fast! (6,3)

Ross

I believe the answer is:

cresta run

'it's going downhill fast' is the definition.
(type of toboggan track)

'get on top of a series' is the wordplay.
'get on top of' becomes 'crest' (crest can mean to get to the top of something).
'series' becomes 'run' (a run or sequence of things).
'crest'+'a'+'run'='CRESTA RUN'

(Other definitions for cresta run that I've seen before include "Frozen channel" , "tobogganing slope" , "Swiss skeleton toboggan track" .)

I've seen this clue in The Times.
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.