Ride in study (3)
I believe the answer is:
den
This clue might be a double definition.
'ride' is the first definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'study' is the second definition.
(term for a study or office)
'in' is the link.
Can you help me to learn more?
(Other definitions for den that I've seen before include "Animal's lair or man's study" , "Hiding place" , "Animal's lair or gent's study" , "Room for work or play" , "Private office" .)