Ecologically OK on the golf course? (5)
I believe the answer is:
green
'the golf course?' is the definition.
(thesaurus)
'ecologically ok on' is the wordplay.
I cannot really see how this works, but
'on' could be 're' (regarding) and 're' is present in the answer.
The remaining letters 'gen' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for green that I've seen before include "cheap marijuana" , "Between blue and yellow in the colour spectrum" , "one of eighteen" , "Eg, avocado, emerald" , "Politician perhaps" .)