Neighbourhood introduces new sporting venue (5)
I believe the answer is:
arena
'sporting venue' is the definition.
(I've seen this before)
'neighbourhood introduces new' is the wordplay.
'neighbourhood' becomes 'area' (I've seen this before).
'introduces' indicates putting letters inside.
'new' becomes 'n'.
'area' placed around 'n' is 'ARENA'.
(Other definitions for arena that I've seen before include "Wembley, for example" , "Olympic venue?" , "Sports or entertainment venue" , "Coliseum" , "Playing field or boxing ring" .)