Where to have a cuppa? With commander in rented building (3,6)
I believe the answer is:
tea garden
'where to have a cuppa?' is the definition.
(place to have a cup of tea)
'commander in rented building' is the wordplay.
'commander' becomes 'aga' (I've seen this before).
'in' is an insertion indicator.
'building' is an anagram indicator.
'rented' anagrammed gives 'terden'.
'aga' inserted inside 'terden' is 'TEA-GARDEN'.
'with' acts as a link.
(Other definitions for tea garden that I've seen before include "trombonist" , "Kind of plantation" , "Open-air cafeteria" , "eat alfresco here" , "Outdoor cafe" .)