Do they keep to the beaten track? (6)

I believe the answer is:

losers

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'do they' is the definition.
The definition suggests a plural noun which matches the answer.

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for losers that I've seen before include "They're unsuccessful" , "Also-rans" , "Odd sorels don't win" , "They're defeated" , "Odd sorels never win" .)

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

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