Mate got married, keeled over creating a bit of a flap (6)
I believe the answer is:
dewlap
'flap' is the definition.
(flap of skin on an animal's neck)
'mate got married keeled over' is the wordplay.
'mate' becomes 'pal' (I've seen this before).
'got married' becomes 'wed' (I've seen this in another clue).
'keeled over' says the letters should be written backwards.
'pal'+'wed'='palwed'
'palwed' back-to-front is 'DEWLAP'.
'creating a bit of a' is the link.
This may not be right. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for dewlap that I've seen before include "Throat's loose skin" , "Fold of loose skin that hangs beneath throat" , "Some hide" , "Fold of skin hanging beneath the throat" , "Fold of loose skin on some old necks" .)