Understand editorial about extremely manly game (6-2-6)
I believe the answer is:
follow-my-leader
'game' is the definition.
(I've seen this before)
'understand editorial about extremely manly' is the wordplay.
'understand' becomes 'follow' ().
'editorial' becomes 'leader' (both can mean a type of newspaper article).
'about' is a charade indicator (letters next to each other).
'extremely' says to hollow out the word (remove centre letters) (letters on the extremes of the word are used).
'manly' with its centre removed is 'my'.
'leader' put after 'my' is 'myleader'.
'follow'+'myleader'='FOLLOW-MY-LEADER'
(Another definition for follow-my-leader that I've seen is " Mimicking game".)