Allure of tea room (5)
I believe the answer is:
charm
'allure' is the definition.
(thesaurus)
'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'
'of' is the link.
(Other definitions for charm that I've seen before include "Talisman; flock of goldfinches" , "Amulet; attractive quality" , "Group of goldfinches" , "Spell; ornament" , "Engaging quality" .)