Project warning of a golfer's form (8)
I believe the answer is:
forecast
'project' is the definition.
(thesaurus)
'warning of a golfer's form' is the wordplay.
'warning of a golfer' becomes 'fore' (I can't justify this - if you can you should believe this answer much more).
'form' becomes 'cast' (casting is a kind of forming).
'fore'+'cast'='FORECAST'
Can you help me to learn more?
(Other definitions for forecast that I've seen before include "Prediction, about the weather perhaps" , "Predict (event)" , "Divine" , "Meteorological surmise perhaps" , "Prophesy" .)