Boris broke bar in small restaurant (6)
I believe the answer is:
bistro
'small restaurant' is the definition.
(I've seen this before)
'boris broke bar in' is the wordplay.
'broke' indicates anagramming the letters.
'bar' becomes 't' (T-bar is a part of a ski lift).
'in' means one lot of letters goes inside another.
'boris' anagrammed gives 'bisro'.
'bisro' placed around 't' is 'BISTRO'.
(Other definitions for bistro that I've seen before include "Modest restaurant" , "Small informal French cafi" , "Eating place" , "Small informal French restaurant" , "'Small, inexpensive restaurant (6)'" .)