Select players in wigs inspiring joyousness regularly (6,5)
I believe the answer is:
choose sides
'select players' is the definition.
I don't know anything about this answer so I cannot tell whether this works.
'wigs inspiring joyousness regularly' is the wordplay.
'wigs' becomes 'chides' (I am not sure about this - if you are sure you should believe this answer much more).
'inspiring' means one lot of letters goes inside another.
'regularly' means one should take alternating letters (regularly take one letter, leave next etc.).
The alternate letters of 'joyousness' are 'ooses'.
'chides' enclosing 'ooses' is 'CHOOSE SIDES'.
'in' acts as a link.
Can you help me to learn more?
(Another definition for choose sides that I've seen is " Join a faction".)