Race inside wild techno club (9)
I believe the answer is:
truncheon
'club' is the definition.
(type of weapon)
'race inside wild techno' is the wordplay.
'race' becomes 'run' (run is a kind of race).
'inside' is an insertion indicator.
'wild' is an anagram indicator.
'techno' with letters rearranged gives 'tcheon'.
'run' going inside 'tcheon' is 'TRUNCHEON'.
(Other definitions for truncheon that I've seen before include "Policeman's club" , "Peelers' baton" , "Policeman's traditional weapon" , "Police baton" , "Police staff" .)