Best spinner, neither winner nor loser? (3-6)
I believe the answer is:
top-drawer
'best' is the definition.
(informal phrase meaning the best available)
'spinner neither winner nor loser?' is the wordplay.
'spinner' becomes 'top' (a spinning top).
'neither winner nor loser?' becomes 'drawer' (I've seen this before).
'top'+'drawer'='TOP-DRAWER'
(Other definitions for top-drawer that I've seen before include "Excellent" , "Perfect" , "Of the highest standing" , "of high social standing" .)