Girl to live recklessly (6)
I believe the answer is:
violet
'girl' is the definition.
'to live recklessly' is the wordplay.
'recklessly' is an anagram indicator.
'to'+'live'='tolive'
'tolive' is an anagram of 'VIOLET'.
(Other definitions for violet that I've seen before include "Purplish colour" , "Colour; flower, source of fragrance" , "Seldom" , "Bluish purple" , "Herbaceous flower" .)