Moving passage from 'Tristan' (7)
I believe the answer is:
transit
'moving passage' is the definition.
'transit' can be an answer for 'passage' (synonyms). I am unsure of the 'moving' bit.
'from tristan' is the wordplay.
'from' indicates anagramming the letters (from the letters).
'tristan' with letters rearranged gives 'TRANSIT'.
Can you help me to learn more?
(Other definitions for transit that I've seen before include "To pass through/across" , "Haulage" , "Movement (of goods)" , "The process of going or conveying" , "The carrying of people etc" .)