A pest on the golf course? (8)
I believe the answer is:
greenfly
'a pest' is the definition.
(I've seen this before)
'on the golf course?' is the wordplay.
I cannot quite understand how this works, but
'on' could be 're' (regarding) and 're' is present in the answer.
'golf' could be 'g' (phonetic alphabet: alpha, bravo, charlie etc.) and 'g' is present in the answer.
'course?' could be 'n' and 'n' is found within the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for greenfly that I've seen before include "Pests" , "Garden pest" , "Common aphids" , "Common aphid" .)