Economical new fur for a girl (6)
I believe the answer is:
frugal
'economical' is the definition.
(synonyms)
'new fur for a girl' is the wordplay.
'new' indicates an anagram.
'for' is a charade indicator (letters next to each other).
'a girl' becomes 'gal' ('gal' can be a synonym of 'girl').
'fur' is an anagram of 'fru'.
'fru'+'gal'='FRUGAL'
(Other definitions for frugal that I've seen before include "Tight" , "Sparing, avoiding waste," , "'Thrifty, avoiding waste (6)'" , "Taking care" , "Economical with food or money" .)