Looking after a vehicle in top garage (6)
I believe the answer is:
caring
'looking' is the definition.
Both the answer and definition are adjectives. Maybe you can see an association between them that I don't see?
'a vehicle in top garage' is the wordplay.
'a vehicle' becomes 'car' (car is a kind of vehicle).
'top' says to take the initial letters (in a down clue, the first letter is top).
The initial letter of 'garage' is 'g'.
'car'+'in'+'g'='CARING'
'after' is the link.
Can you help me to learn more?
(Other definitions for caring that I've seen before include "Displaying kindness and concern for others" , "Feeling concern or interest" , "Protective or concerned" , "Showing concern" , "Feeling concern/interest" .)