Into drugs, nine played sport (5,6)
I believe the answer is:
table tennis
'sport' is the definition.
(I've seen this before)
'into drugs nine played' is the wordplay.
'into' indicates putting letters inside.
'drugs' becomes 'tablets' (tablet is a kind of drug).
'played' indicates anagramming the letters (letters playing around).
'nine' anagrammed gives 'enni'.
'tablets' going around 'enni' is 'TABLE-TENNIS'.
(Other definitions for table tennis that I've seen before include "Indoor game" , "Ping pong" , "Ping-pong" , "sport" .)