Just finished a rambling tour with an instructor (5)
I believe the answer is:
tutor
'an instructor' is the definition.
(I know that tutor is a type of instructor)
'just finished a rambling tour' is the wordplay.
I cannot really see how this works, but
an anagram of 'tour' is 'utor' which is located in the answer.
A single letter 't' remains which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
'with' is the link.
Can you help me to learn more?
(Other definitions for tutor that I've seen before include "Master" , "Teacher (often private)" , "train" , "Private instructor" , "Guardian" .)