A cold distant attitude is around since moving (7)
I believe the answer is:
iciness
'a cold distant attitude' is the definition.
(quality of being cold or distant)
'is around since moving' is the wordplay.
'around' indicates putting letters inside.
'moving' indicates an anagram.
'since' anagrammed gives 'cines'.
'is' going around 'cines' is 'ICINESS'.
(Other definitions for iciness that I've seen before include "Extreme chill" , "Extreme hostility" , "unfriendly manner" , "Frigidity" , "State of being very cold or distant" .)