Oddly such mob goes to game (8)
I believe the answer is:
scrabble
'game' is the definition.
(Scrabble is a board game)
'oddly such mob goes to' is the wordplay.
'oddly' indicates alternate letters (letters in odd-numbered positions).
'mob' becomes 'rabble' (synonyms).
'goes to' is a charade indicator (letters next to each other).
The alternate letters of 'such' are 'sc'.
'sc'+'rabble'='SCRABBLE'
(Other definitions for scrabble that I've seen before include "Popular word game using board" , "Scratch or grope around" , "Popular word game played on a board" , "In which X=8 and Z=10" , "Clabbers in popular word game" .)