Climate adjusted a shop meter (10)
I believe the answer is:
atmosphere
'climate' is the definition.
(atmosphere is a kind of climate)
'adjusted a shop meter' is the wordplay.
'adjusted' is an anagram indicator.
'a'+'shop'+'meter'='ashopmeter'
'ashopmeter' anagrammed gives 'ATMOSPHERE'.
(Other definitions for atmosphere that I've seen before include "Feeling" , "climate" , "Pervading tone or mood" , "Air" , "blue?" .)