Most sensational tablets stored in container for preacher (8)
I believe the answer is:
pulpiest
'most sensational' is the definition.
Both the answer and definition are superlative adjectives. Perhaps you can see an association between them that I don't see?
'tablets stored in container for preacher' is the wordplay.
I cannot quite understand how this works, but
'tablets' could be 'es' (E can refer to an ecstasy tablet) and 'es' is present in the answer.
The remaining letters 'pulpit' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Another definition for pulpiest that I've seen is " Far from hardest".)