International traveller initially thought reclusive (9)

I believe the answer is:
introvert
'reclusive' is the definition.
Both the answer and definition are adjectives. Perhaps you can see a link between them that I can't see?
'international traveller initially thought' is the wordplay.
'international' becomes 'int' (abbreviation for international).
'traveller' becomes 'rover' (rover is a kind of traveller).
'initially' suggests taking the first letters.
The first letter of 'thought' is 't'.
'int'+'rover'+'t'='INTROVERT'
Can you help me to learn more?
(Other definitions for introvert that I've seen before include "Turn inwards" , "One who's withdrawn" , "Self-absorbed person" , "eschewing external contact" , "Withdrawn type" .)
