Appalled to find the inside of the bag has torn (6)
I believe the answer is:
aghast
'appalled' is the definition.
(I know that appalled can be written as aghast)
'the inside of the bag has torn' is the wordplay.
'the inside of' indicates a hidden word (I've seen 'inside' mean this).
'AGHAST' is hidden in the letters of 'bag has torn'.
'to find' is the link.
(Other definitions for aghast that I've seen before include "Filled with consternation or horror" , "Horrified, appalled" , "Appalled, filled with consternation" , "Horror-stricken, filled with consternation" , "struck with fear" .)