Picture of antelope's better moving heading to the bottom (9)
I believe the answer is:
landscape
'picture' is the definition.
(landscape is a kind of picture)
'antelope's better moving heading to the bottom' is the wordplay.
I cannot really see how this works, but
'better' could be 'cap' (both can mean to beat somebody else's attempt) and 'cap' is found within the answer.
This explanation may well be incorrect...
'of' is the link.
Can you help me to learn more?
(Other definitions for landscape that I've seen before include "Oil perhaps" , "Views" , "Broad view of scenery" , "improve grounds" , "Artistic work" .)