Of the highest quality (3-5)
'of the highest quality' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for finest that I've seen before include "Most splendid" , "A1" , "Most delicate or topmost" , "Superior in quality" , "Of the highest quality" .)
(Other definitions for gilt-edged that I've seen before include "Of investments, considered to very safe" , "(Of investments) regarded as extremely reliable" , "Of high quality and reliable" , "Like reliable stocks or securities" .)
'of the highest quality' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for top-notch that I've seen before include "Superb" , "Grade 1" , "Excellent (informal)" , "Wonderful" , "Of the highest quality" .)