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 "eleven?", "Side; match", "Group or squad", "Company", "Side; harness (horses)", "Group pulling together", "Side in sporting event", "Players united", "Mate with game group" and "People working together".)