Crossword Genius

Shelters accommodate fifty per cent of rides in characteristic groups (7)

Ross

I believe the answer is:

cohorts

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'groups' is the definition.
(cohort is a kind of group)

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for cohorts that I've seen before include "Henchmen" , "Partners" .)

I've seen this clue in The Telegraph.
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