Ground-breaking tool (3)
'ground-breaking tool' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for hoe that I've seen before include "Tool for loosening soil and scraping up weeds" , "Garden tool for scraping up weeds" , "Tool; promontory" , "Weeding implement" , "Garden tool with a flat blade" .)
(Other definitions for spade that I've seen before include "one of thirteen?" , "Digging implement" , "that has a cutting edge" , "Digging tool" , "Black leaf-shaped symbol on playing card" .)