Behind initially in Goodwood race meeting (11)
I believe the answer is:
assignation
'meeting' is the definition.
(assignation is a kind of meeting)
'behind initially in goodwood race' is the wordplay.
I cannot really understand how this works, but
'behind' could be 'ass' ('ass' can be a synonym of 'behind') and 'ass' is present in the answer.
'race' could be 'nation' (I've seen this before) and 'nation' is found in the answer.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for assignation that I've seen before include "The date" , "Secret meeting" , "clandestine meeting" , "Go in as saint (anag.)" , "Secret rendezvous" .)