Insouciant (8)
'insouciant' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for carefree that I've seen before include "Not bothered" , "Without the burden of responsibility" , "Happy and blithe - no worries" , "Untroubled" , "Jaunty" .)
(Other definitions for leisurely that I've seen before include "Not forced" , "Unhurried, taking one's time" , "Laid-back" , "Slow-moving" , "Sue Reilly for being relaxed" .)
'insouciant' is the definition.
(thesaurus)
This is the entire clue.
(Other definitions for blithe that I've seen before include "Cheerfully indifferent" , "Joyful and unconcerned" , "With neither worries nor cares" , "Happy, joyous" , "happy and cheerful" .)