Team's various red cards (6)
I believe the answer is:
hearts
This clue might be a double definition.
'team's' is the first definition.
(I've seen this before)
'various red cards' is the second definition.
'hearts' can be an answer for 'cards' (heart is a kind of card). I am not certain of the 'various red' bit.
Can you help me to learn more?
(Other definitions for hearts that I've seen before include "Cores" , "Vital organs in the pack" , "Card suits in bodies" , "Card game and centres of emotions, it's said" , "Body pumps" .)