Casual, nonchalant (7)
I believe the answer is:
offhand
I believe this is a double definition.
'casual' is the first definition.
(synonyms)
'nonchalant' is the second definition.
(I've seen this before)
(Other definitions for offhand that I've seen before include "Where fingerprints are taken" , "Of speech, casual or curt" , "Casual or curt, like discarded glove?" , "Dismissive; curt" , "Discourteous" .)