Projection for new leader of Greens (5)
I believe the answer is:
prong
'projection' is the definition.
(prong is a kind of projection)
'for new leader of greens' is the wordplay.
'for' becomes 'pro' (I've seen this before).
'new' becomes 'n'.
'leader of' says to take the initial letters.
The initial letter of 'greens' is 'g'.
'pro'+'n'+'g'='PRONG'
(Other definitions for prong that I've seen before include "Something piercing" , "Fork part" , "Tooth" , "one gets stuck into dinner" , "Fork's point" .)