Do get involved in some game (8)
I believe the answer is:
dominoes
'game' is the definition.
(dominoes is a kind of game)
'do get involved in some' is the wordplay.
'get' is a charade indicator (letters next to each other).
'involved' indicates an anagram (involved can mean confusing or complex).
'in'+'some'='insome'
'insome' with letters rearranged gives 'minoes'.
'do'+'minoes'='DOMINOES'
(Other definitions for dominoes that I've seen before include "Traditional pub game" , "Table-top game" , "Game with twenty-eight pieces" , "masks" , "Game played with black pieces with white spots" .)