Groups of athletes (5)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
teams
'groups of athletes' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for teams that I've seen before include "Lots of players" , "Crews" , "Squads" , "Groups or troupes" , "Sports sides" .)