Unusual scale for outside location (8)
I believe the answer is:
alfresco
'unusual scale for outside location' is the definition.
I can't tell whether this definition defines the answer.
'unusual scale for' is the wordplay.
'unusual' is an anagram indicator.
'scale'+'for'='scalefor'
'scalefor' is an anagram of 'ALFRESCO'.
Can you help me to learn more?
(Other definitions for alfresco that I've seen before include "Meal eaten in the outdoors" , "Open-air" , "out of the house" , "Outside" , "exposed to the fresh air" .)