Imprison one after another, as suggested by hearing (6)

I believe the answer is:
inturn
'imprison one after another' is the definition.
I can't tell whether this definition defines the answer.
'as suggested by hearing' is the wordplay.
'as' becomes 'in' (I've seen this in other clues).
'suggested by hearing' becomes 'turn' (I can't justify this - if you can you should believe this answer much more).
'in'+'turn'='INTURN'
Can you help me to learn more?
(Other definitions for inturn that I've seen before include "One after the other (2.4)" , "One after the other - pass it around" , "Given money for work" , "According to orderly sequence" , "One after the other, successively" .)
