Possibly incredible place for a ball (3)
I believe the answer is:
lie
'possibly incredible place' is the definition.
'lie' can be an answer for 'place' (lie is a kind of place). I am not certain of the 'possibly incredible' bit.
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for lie that I've seen before include "Tell untruths" , "Perjure" , "Rest; falsehood" , "Couch" , "Be prostrate" .)