Assessed, having one's contraption sounded (9)
I believe the answer is:
resonated
'sounded' is the definition.
(resonating is a kind of sounding)
'assessed having one's contraption' is the wordplay.
'assessed' becomes 'rated' (rating is a kind of assessing).
'having' is an insertion indicator.
'contraption' indicates anagramming the letters.
'ones' with letters rearranged gives 'eson'.
'rated' placed around 'eson' is 'RESONATED'.
(Other definitions for resonated that I've seen before include "Continued to ring" , "Reverberated" , "Rung" , "Vibrated sympathetically" , "struck a chord" .)