Finally settle the legitimate fine (8)
I believe the answer is:
ethereal
'fine' is the definition.
(I've seen this before)
'finally settle the legitimate' is the wordplay.
'finally' says to take the final letters.
'legitimate' becomes 'real' (I've seen this in another clue).
The final letter of 'settle' is 'e'.
'e'+'the'+'real'='ETHEREAL'
(Other definitions for ethereal that I've seen before include "Light and delicate in appearance, heavenly" , "Light, delicate, insubstantial" , "Having an unreal lightness or delicateness" , "Delicate and perfect" , "Warm approval" .)