It is about half of them on Ecstasy making record (7)
I believe the answer is:
itemise
'record' is the definition.
('record'->'itemize' is in my internal thesaurus and 'ize'->'ise')
'it is about half of them on ecstasy' is the subsidiary indication.
'about' is a charade indicator (letters next to each other).
'half of' means to take half the letters.
'on' is a charade indicator (letters next to each other).
'ecstasy' becomes 'e' (common term for the illegal drug).
'them' cut in half is 'em'.
'is' put after 'em' is 'emis'.
'it'+'emis'+'e'='itemise'
'making' is the link.
(Other definitions for itemise that I've seen before include "Using spell out" , "catalogue" , "List exhaustively" , "Set down separately" , "specific" .)