Awe inspired in the end regarding poster (5)
I believe the answer is:
dread
'awe' is the definition.
(thesaurus)
'inspired in the end regarding poster' is the wordplay.
'in the end' indicates one should take the final letters.
'regarding' becomes 're'.
'poster' becomes 'ad'.
The final letter of 'inspired' is 'd'.
'd'+'re'+'ad'='DREAD'
(Other definitions for dread that I've seen before include "quail" , "Adder (anag)" , "Anticipate with horror" , "Hairstyle" , "Anticipate with fear" .)