Unorthodox belief in this place starts to surprise you (6)
I believe the answer is:
heresy
'unorthodox belief' is the definition.
(I've seen this before)
'this place starts to surprise you' is the wordplay.
'this place' becomes 'here' (I've seen this before).
'starts to' suggests taking the first letters.
The first letters of 'surprise you' is 'sy'.
'here'+'sy'='HERESY'
'in' acts as a link.
(Other definitions for heresy that I've seen before include "Deviation from orthodox religious thinking" , "unorthodox views" , "Religious unorthodoxy" , "uncommon view" , "Divergence from orthodoxy" .)