European wearing tie at revolving restaurant (7)
I believe the answer is:
tearoom
'restaurant' is the definition.
(I know that tearoom is a type of restaurant)
'european wearing tie at revolving' is the wordplay.
'european' becomes 'E' (abbreviation e.g. EU).
'wearing' indicates putting letters inside.
'tie' becomes 'moor' (to moor a boat is to tie it up).
'revolving' says the letters should be written in reverse.
'moor'+'at'='moorat'
'e' put within 'moorat' is 'mooraet'.
'mooraet' back-to-front is 'TEAROOM'.
(Other definitions for tearoom that I've seen before include "24" , "Small restaurant" , "Place in which a cuppa is served" , "Restaurant for light meals" , "Small cafe" .)