Singular language used by golf party (7)
I believe the answer is:
shindig
'party' is the definition.
(I know that shindig is a type of party)
'singular language used by golf' is the wordplay.
'singular' becomes 's' (abbreviation sometimes used in dictionaries).
'language' becomes 'hindi' (Hindi is an example).
'used by' is a charade indicator (letters next to each other).
'golf' becomes 'g' (phonetic alphabet: alpha, bravo, charlie etc.).
's'+'hindi'+'g'='SHINDIG'
(Other definitions for shindig that I've seen before include "wild party" , "Noisy knees-up" , "Lively celebration (informal)" , "Large and noisy party or quarrel" , "Big lively party (colloq.)" .)