Of superlative quality (6)
I believe the answer is:
tiptop
(Other definitions for tiptop that I've seen before include "Capital" , "First-rate" , "Very fine" , "Best of its kind" , "Informally excellent, very best" .)
I believe the answer is:
tiptop
(Other definitions for tiptop that I've seen before include "Capital" , "First-rate" , "Very fine" , "Best of its kind" , "Informally excellent, very best" .)