Team regrouping for end of game (4)
I believe the answer is:
mate
'team' is the definition.
(thesaurus)
'regrouping for end of game' is the wordplay.
'regrouping for' becomes 'mat' (I can't explain this - if you can you should give a lot more credence to this answer).
'end of' says to take the final letters.
The last letter of 'game' is 'e'.
'mat'+'e'='MATE'
Can you help me to learn more?
(Other definitions for mate that I've seen before include "Pal on team" , "Friend, companion" , "Friend; ship's officer" , "Spouse or informal pal (4)" , "Chess ending; pal" .)