Ski lift (4)
(Another definition for tbar that I've seen is " Tower, perhaps".)
'ski lift' is the definition.
(I know that T-bar is a type of surface lift)
This is all the clue.
(Other definitions for t-bar that I've seen before include "Type of towing lift for skiers" , "Type of ski lift" , "that provides lifts?" , "Type of ski-lift" , "Towing ski lift" .)