Found reduction, surprisingly (9)
I believe the answer is:
introduce
'found' is the definition.
(thesaurus)
'reduction surprisingly' is the wordplay.
'surprisingly' indicates an anagram (a surprising ordering of the letters).
'reduction' anagrammed gives 'INTRODUCE'.
(Other definitions for introduce that I've seen before include "Present, make known" , "Start; present" , "Present (someone) by name" , "Bring to notice or make known" , "Bring in - cause to meet" .)