People working together drink to the end of boredom (4)
I believe the answer is:
Here is my best explanation:
'people working together' is the definition.
(I've seen this before)
'drink to the end of boredom' is the subsidiary indication.
'drink' becomes 'tea' (tea is a kind of drink).
'to the end of' says to take the final letters.
The last letter of 'boredom' is 'm'.
(Other definitions for team that I've seen before include "Side; harness (horses)", "Group pulling together", "People working together", "Side in sporting event", "See 22", "Crew", "Mate with game group", "Group working in combination", "Squad; side" and "One side in a game".)