A girl has to live somehow (6)
I believe the answer is:
violet
'a girl' is the definition.
'to live somehow' is the wordplay.
'somehow' is an anagram indicator.
'to'+'live'='tolive'
'tolive' with letters rearranged gives 'VIOLET'.
'has' acts as a link.
(Other definitions for violet that I've seen before include "Colour midway between red and blue" , "Seldom" , "plant" , "Reddish blue colour" , "Shade of purple" .)