Listener goes in to order in small restaurant (3,4)
I believe the answer is:
tea room
'small restaurant' is the definition.
(I've seen this before)
'listener goes in to order' is the wordplay.
'listener' becomes 'ear' (I've seen this before).
'goes in' indicates putting letters inside.
'order' becomes 'om' (order of merit).
'ear' inserted within 'to' is 'tearo'.
'tearo'+'om'='TEA-ROOM'
'in' is the link.
(Other definitions for tea room that I've seen before include "Small restaurant or cafe" , "Where light refreshments are served" , "Place for light refreshments" , "Place in which a cuppa is served" .)