Mount ski lift touring American city (5)
I believe the answer is:
rabat
'city' is the definition.
(Rabat is an example)
'mount ski lift touring american' is the wordplay.
'mount' says the letters should be written in reverse (I've seen 'mounted' mean this).
'ski lift' becomes 'tbar' (T-bar is an example).
'touring' is an insertion indicator (touring can mean going round).
'american' becomes 'a' (common abbreviation - e.g. in organisation names).
'tbar' going around 'a' is 'tabar'.
'tabar' backwards is 'RABAT'.
(Other definitions for rabat that I've seen before include "N African capital" , "North African capital" , "Capital of Morocco" , "Moroccan city" , "N African city" .)