Bird has knocked figure on horse over (6)
I believe the answer is:
gannet
'bird' is the definition.
(gannet is a kind of bird)
'knocked figure on horse over' is the wordplay.
'knocked' says the letters should be written in reverse (I've seen 'knocking' mean this).
'figure' becomes 'ten' (ten is a number or figure).
'on' is a charade indicator (letters next to each other).
'horse over' becomes 'nag' (term for an old horse. I am not sure about the 'over' bit.).
'ten'+'nag'='tennag'
'tennag' reversed gives 'GANNET'.
'has' is the link.
Can you help me to learn more?
(Other definitions for gannet that I've seen before include "Seabird - glutton" , "Marine bird - greedy person" , "Large diving sea bird" , "Ten nag the sea-baird" , "Large seabird noted for its plunging dives for fish" .)