Great throw, just missing top (8)
I believe the answer is:
heavenly
'great' is the definition.
(thesaurus)
'throw just missing top' is the wordplay.
'throw' becomes 'heave' (heave is a kind of throw).
'just' becomes 'only' (synonyms).
'missing top' means to remove the first letter.
'only' with its initial letter taken off is 'nly'.
'heave'+'nly'='HEAVENLY'
(Other definitions for heavenly that I've seen before include "Glorious" , "Blissful" , "Celestial" , "Divine" , "Wonderful" .)