Mitten girls initially adore (5)
I believe the answer is:
glove
'mitten' is the definition.
(I've seen this before)
'girls initially adore' is the wordplay.
'initially' suggests taking the first letters.
'adore' becomes 'love' (I've seen this in another clue).
The first letter of 'girls' is 'g'.
'g'+'love'='GLOVE'
(Other definitions for glove that I've seen before include "Hand-cover" , "Proverbially good fitter" , "Mitten" , "something a boxer uses" , "protective wear on" .)