Tea-room entrance (5)
I believe the answer is:
charm
'entrance' is the definition.
('charm' can be a synonym of 'entrance')
'tea-room' is the wordplay.
'tea' becomes 'cha' (cha is a type of tea).
'room' becomes 'rm' (I've seen this in other clues).
'cha'+'rm'='CHARM'
(Other definitions for charm that I've seen before include "small ornament" , "Delight; magical object" , "Lure" , "Entice" , "Power of fascination" .)