Instrument of Green Power absolute (6)
I believe the answer is:
putter
'instrument of green' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'power absolute' is the wordplay.
'power' becomes 'p' (symbol in physics).
'absolute' becomes 'utter' (similar in meaning).
'p'+'utter'='PUTTER'
Can you help me to learn more?
(Other definitions for putter that I've seen before include "Type of golf club" , "Club to use on the green" , "Golf-club" , "Club used on the green" , "Golf club used on greens" .)