Leaving before boy's events (6,2)
I believe the answer is:
goings on
'events' is the definition.
(I've seen this in another clue)
'leaving before boy's' is the wordplay.
'leaving' becomes 'going' (synonyms).
'before' says to put letters next to each other.
'boy' becomes 'son' (synonyms).
'going'+'son'='GOINGS-ON'
(Other definitions for goings on that I've seen before include "Suspect business" , "mischief" , "suspect behaviour" , "scandalous behaviour" , "Funny business" .)