The opening where you turn for the town centre (6)
I believe the answer is:
window
'the opening' is the definition.
(a window is an opening)
'turn for the town centre' is the wordplay.
'turn' becomes 'wind' (I've seen this before).
'for' is a charade indicator (letters next to each other).
'the town centre' becomes 'ow' (central letters of the word 'town').
'wind'+'ow'='WINDOW'
'where you' is the link.
This may not be correct. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for window that I've seen before include "Clear panel in envelope" , "See 8" , "Glass aperture" , "Skylight" , "Glass-filled opening" .)