An implement you need to push at the right angle (6)
I believe the answer is:
shovel
'an implement' is the definition.
(shovel is a kind of implement)
'to push at the right angle' is the wordplay.
'to push' becomes 'shove' (shove is a kind of push).
'at' is a charade indicator (letters next to each other).
'the right angle' becomes 'L' (the shape of the letter is a right angle).
'shove'+'l'='SHOVEL'
'you need' acts as a link.
(Other definitions for shovel that I've seen before include "Spade-like tool" , "Excavator" , "Digging implement" , "Scooper" , "Spade with a broad blade" .)