Possible Clues:

• Male with a song over a massive range
• Greeting old country, it's to do with mountains
• Greeting from Siam to old neighbour, perhaps, from long range
• Where Kim's exploits reached the heights
• Of a vast Asian mountain range
• Sanskrit for 'abode of snow'
• One SE Asian in hot area — mountain range
• Nepal's — Mountains
• Sanskrit for “abode of snow”
• Vast Asian mountain system