Secure management group that shows results (10)
I believe the answer is:
scoreboard
'group that shows results' is the definition.
Although both the answer and definition are singular nouns, I can't see how they can define each other.
'secure management' is the wordplay.
'secure' becomes 'score' (I can't justify this - if you can you should believe this answer much more).
'management' becomes 'board' (eg the board managing a business).
'score'+'board'='SCOREBOARD'
Can you help me to learn more?
(Other definitions for scoreboard that I've seen before include "It shows state of game" , "On which points are tallied" , "Indicator of the state of play" , "It should feature up-to-date numbers" , "Where match results are displayed" .)