Shocked seeing bag has tea inside (6)
I believe the answer is:
aghast
'shocked' is the definition.
('aghast' can be a synonym of 'shocked')
'bag has tea inside' is the wordplay.
'inside' says the answer is hidden in the clue.
'AGHAST' is hidden in the letters of 'bag has tea'.
'seeing' acts as a link.
(Other definitions for aghast that I've seen before include "Confounded" , "Very unhappy" , "'Appalled, dismayed (6)'" , "Stupefied with horror" , "Deeply shocked" .)