Instrument from which a ring rang out? (5)
I believe the answer is:
organ
'instrument' is the definition.
(I know that organ is a type of instrument)
'a ring rang out?' is the wordplay.
'a ring' becomes 'o' (letter resembling a ring).
'out?' indicates an anagram (out can mean wrong or inaccurate).
'rang' is an anagram of 'rgan'.
'o'+'rgan'='ORGAN'
'from which' is the link.
(Other definitions for organ that I've seen before include "Church keyboard instrument" , "With prompt enthusiasm" , "Body part - wind instrument" , "Large musical instrument often heard in church" , "specialist magazine" .)