Types a ring on each end of ‘unbolt’ and rectifies (5,3)

'rectifies' is the definition.
Although both the answer and definition are verbs in their -s form, I don't see how one could define the other.

'types a ring on each end of unbolt' is the wordplay.
'types' becomes 'sorts' (I've seen this before).
'a ring' becomes 'o' (letter resembling a ring).
'on each' becomes 'u' (I am not sure about this - if you are sure you should believe this answer much more).
'end of' indicates one should take the final letters.
The final letter of 'unbolt' is 't'.
'sorts'+'o'+'u'+'t'='SORTS OUT'

'and' acts as a link.

Can you help me to learn more?