Pitchers meanwhile throw the quicker balls last of all (5)
I believe the answer is:
ewers
'pitchers' is the definition.
('ewer' can be a synonym of 'pitcher')
'meanwhile throw the quicker balls last of all' is the wordplay.
'last of all' suggests the final letters.
The last letters of 'meanwhile throw the quicker balls' are 'EWERS'.
(Other definitions for ewers that I've seen before include "Vessels with handle and spout" , "Large jugs" , "Vase-shaped jugs" , "Jugs thrown into sewer" , "Water jugs" .)