Part of Russia is actually up here? (4)
I believe the answer is:
asia
'here?' is the definition.
The answer is a location as well as being a singular noun. This is suggested by the definition.
'part of russia is actually up' is the wordplay.
'part of' indicates the answer is hidden within the clue.
'up' says the letters should be written backwards (in down clue: letters go upwards).
'aisa' is hidden within 'russia is actually'.
'aisa' in reverse letter order is 'ASIA'.
Can you help me to learn more?
(Other definitions for asia that I've seen before include "Heavily populated area" , "lands in the east" , "Stretch of land" , "space for economic expansion?" , "Earth's largest continent" .)