Turning up, for example, about to throw ball (5)
I believe the answer is:
globe
'ball' is the definition.
(synonyms)
'turning up for example about to throw' is the wordplay.
'turning up' says the letters should be written in reverse.
'for example' becomes 'eg' (synonyms).
'about' means one lot of letters goes inside another.
'to throw' becomes 'lob' (lobbing is a kind of throwing).
'eg' backwards is 'ge'.
'ge' enclosing 'lob' is 'GLOBE'.
(Other definitions for globe that I've seen before include "Rounded object" , "stage for Shakespeare" , "Representation of earth" , "Orb, ball" , "Spherical shape" .)