Ball in from the wing leading to save that goes onto both posts (8)
I believe the answer is:
crossbar
'that goes onto both posts' is the definition.
(bar that goes on top of goalposts)
'ball in from the wing leading to save' is the wordplay.
I cannot really see how this works, but
'ball' could be 'cross' (cross is a pass in football - ball can mean a pass) and 'cross' is located in the answer.
'wing' could be 'r' (r is abbreviation for right) and 'r' is present in the answer.
The remaining letters 'ba' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for crossbar that I've seen before include "Horizontal piece, on a bicycle say" , "one's seen on a bike?" , "Helps to define the goal" , "Horizontal beam over goal posts" , "One of two on football field" .)