Bit of chinwag has tendency to make one shocked (6)
I believe the answer is:
aghast
'one shocked' is the definition.
(I've seen this before)
'bit of chinwag has tendency to' is the wordplay.
'bit of' says the answer is hidden in the clue.
'AGHAST' can be found hidden inside 'chinwag has tendency to'.
'make' acts as a link.
(Other definitions for aghast that I've seen before include "in awe" , "Thunderstruck" , "What's carried in bag has teacher" , "Deeply shocked" , "Horror-stricken, filled with consternation" .)