Route through a yard: no interest in it (6)
I believe the answer is:
apathy
'no interest in it' is the definition.
I can't tell whether this defines the answer.
'route through a yard' is the wordplay.
'route' becomes 'path' (synonyms).
'through' indicates putting letters inside (inserted letters go through the word).
'yard' becomes 'y' (abbreviation).
'a'+'y'='ay'
'path' going within 'ay' is 'APATHY'.
Can you help me to learn more?
(Other definitions for apathy that I've seen before include "Torpor" , "Absence of interest or emotion" , "Absence of emotion or enthusiasm" , "Indifference - listlessness" , "Indifferent quality" .)