Golfer swaps one party for another to make birdie? (6)
I believe the answer is:
falcon
'birdie?' is the definition.
'golfer swaps one party' is the wordplay.
'golfer swaps' becomes 'fal' (I can't explain this - if you can you should give a lot more credence to this answer).
'one party' becomes 'con' (abbreviation for Conservatives).
'fal'+'con'='FALCON'
'for another to make' acts as a link.
This may not be correct. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for falcon that I've seen before include "Kind of hunting bird - peregrine is one" , "Hunting bird, may be trained" , "See 16" , "Hunter winged" , "Hunting bird like peregrine or merlin" .)