A familiar name, note, for mountains (4)

I believe the answer is:

alps

I'm a little stuck... Click here to teach me more about this clue!

'for mountains' is the definition.
(European mountain range)

'a familiar name note' is the wordplay.
'a familiar name' becomes 'al' (I am not sure about the 'familiar' bit.).
'note' becomes 'ps' (a PS or postscript in a letter).
'al'+'ps'='ALPS'

Can you help me to learn more?

(Other definitions for alps that I've seen before include "European mountain chain" , "Slopes" , "Slap (anag.)" , "High mountains" , "Mountain system in south-central Europe" .)

I've seen this clue in the Evening Standard.

Want a hint initially instead of a full solution? Install my app