Trick to snort some drug in (9)
I believe the answer is:
Here is my best explanation:
'trick to snort some drug in' is the definition.
I can't tell whether this defines the answer.
'trick to snort some drug in' is the subsidiary indication.
'trick' becomes 'con' (I've seen this before).
'to snort' becomes 'grunt'.
'some drug' becomes 'e' (e is another name for ecstasy).
'in' is an insertion indicator.
'grunt' enclosing 'e' is 'gruent'.
(Other definitions for congruent that I've seen before include "Corresponding with", "perfectly fit", "In agreement" and "In harmony with".)