Takes rum into bachelor party for game (10)
I believe the answer is:
basketball
'game' is the definition.
(basketball game is a kind of game)
'takes rum into bachelor party' is the wordplay.
'rum' indicates anagramming the letters (rum can mean strange or unusual).
'into' is an insertion indicator.
'bachelor' becomes 'b' (abbreviation e.g. BA=Bachelor of Arts).
'party' becomes 'ball' (ball is a kind of party).
'takes' anagrammed gives 'asket'.
'b'+'ball'='bball'
'asket' inserted into 'bball' is 'BASKETBALL'.
'for' acts as a link.
(Other definitions for basketball that I've seen before include "Game involving two hoops" , "that's contested in court" , "American game" , "Major US sport" , "Team game" .)