Answer or reaction (8)
I believe the answer is:
response
I believe this clue is a double definition.
'answer' is the first definition.
(I know that answer can be written as response)
'reaction' is the second definition.
(synonyms)
(Other definitions for response that I've seen before include "Sees porn (anag) - answer" , "bid by partner" , "Reply, rejoinder" , "See porn (anag) -- answer" , "Acknowledgement" .)