They have innate skill to bake up on Russian mountains (8)
I believe the answer is:
naturals
'they have innate skill' is the definition.
The definition suggests an adverb but the answer is not.
'bake up on russian mountains' is the wordplay.
'bake up' becomes 'nat' (I can't explain this - if you can you should give a lot more credence to this answer).
'on' is a charade indicator (letters next to each other) (in a down clue, letters appear on others).
'russian mountains' becomes 'urals' (I've seen this in another clue).
'nat'+'urals'='NATURALS'
'to' is the link.
Can you help me to learn more?
(Other definitions for naturals that I've seen before include "A last run for those with innate talent" , "People with inborn ability for something" , "Turn, alas to people with inborn talents" , "Talented folk" .)