Great Dane on the loose in outside refreshment area (3,6)
I believe the answer is:
tea garden
'outside refreshment area' is the definition.
(outside area serving refreshments)
'great dane on the loose' is the wordplay.
'on the loose' is an anagram indicator.
'great'+'dane'='greatdane'
'greatdane' anagrammed gives 'TEA-GARDEN'.
'in' acts as a link.
(Other definitions for tea garden that I've seen before include "area for refreshments" , "Kind of plantation" , "trombonist" , "Outdoor eating area" , "eat alfresco here" .)