Overflowing jars fill up ten (9)
I believe the answer is:
plentiful
'overflowing' is the definition.
(thesaurus)
'jars fill up ten' is the wordplay.
'jars' indicates anagramming the letters (the letters must be shocked or jarred).
'fill'+'up'+'ten'='fillupten'
'fillupten' anagrammed gives 'PLENTIFUL'.
(Other definitions for plentiful that I've seen before include "Abundant - profuse" , "Productive" , "Abundant, copious" , "Existing in great quantities" , "common" .)