Spooner's cleverly ignoring old eastern riposte (8)
I believe the answer is:
response
'riposte' is the definition.
(thesaurus)
I don't understand how the remainder of the clue works.
(Other definitions for response that I've seen before include "comeback" , "Rejoinder, retort" , "Answer - retort" , "Preens so by way of answer" , "bid by partner" .)